{"id":38656,"date":"2026-08-20T09:00:00","date_gmt":"2026-08-20T02:00:00","guid":{"rendered":"https:\/\/vmts.ch\/?p=38656"},"modified":"2026-08-20T10:07:50","modified_gmt":"2026-08-20T03:07:50","slug":"do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng","status":"publish","type":"post","link":"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/","title":{"rendered":"\u0110\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM: point cloud b\u1ecb nghi\u00eang"},"content":{"rendered":"\n<div style=\"background: #000000; padding: 24px 28px; font-family: Arial,Helvetica,sans-serif; border-left: 4px solid #C70100; margin: 0 0 32px;\">\n<p style=\"font-size: 10px; font-weight: bold; letter-spacing: 0.16em; text-transform: uppercase; color: #c70100; margin: 0 0 14px;\">T\u00f3m t\u1eaft: 3 \u00fd ch\u00ednh<\/p>\n<ul style=\"list-style: none; padding: 0; margin: 0;\">\n<li style=\"display: flex; gap: 12px; padding: 8px 0; border-bottom: 0.5px solid #222222; align-items: flex-start;\"><span style=\"color: #c70100; font-weight: bold; font-size: 13px; flex-shrink: 0; margin-top: 1px; font-family: Arial,Helvetica,sans-serif;\">01<\/span>\n<p style=\"font-size: 13px; color: #cccccc; line-height: 1.55; margin: 0; font-family: Arial,Helvetica,sans-serif;\">Ch\u00eanh l\u1ec7ch gi\u1eefa 1 \u0111\u1ebfn 3 cm c\u00f4ng b\u1ed1 v\u00e0 3 \u0111\u1ebfn 5 cm ch\u00fang t\u00f4i th\u01b0\u1eddng \u0111o \u0111\u01b0\u1ee3c kh\u00f4ng ph\u1ea3i v\u1ea5n \u0111\u1ec1 ch\u00ednh. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7 sai s\u1ed1 n\u00e0y c\u00f3 h\u1ec7 th\u1ed1ng: s\u00e0n v\u00e0 tr\u1ea7n b\u1ecb d\u1ef1ng nghi\u00eang, ch\u1ee9 kh\u00f4ng \u0111\u01a1n thu\u1ea7n l\u00e0 nhi\u1ec5u. V\u1edbi c\u00f4ng t\u00e1c d\u1ef1ng m\u00f4 h\u00ecnh, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ed9 nghi\u00eang ph\u1ea3i \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c tri\u1ec7t \u0111\u1ec3 tr\u01b0\u1edbc khi v\u1ebd b\u1ee9c t\u01b0\u1eddng \u0111\u1ea7u ti\u00ean.<\/p>\n<\/li>\n<li style=\"display: flex; gap: 12px; padding: 8px 0; border-bottom: 0.5px solid #222222; align-items: flex-start;\"><span style=\"color: #c70100; font-weight: bold; font-size: 13px; flex-shrink: 0; margin-top: 1px; font-family: Arial,Helvetica,sans-serif;\">02<\/span>\n<p style=\"font-size: 13px; color: #cccccc; line-height: 1.55; margin: 0; font-family: Arial,Helvetica,sans-serif;\">Sai s\u1ed1 c\u00e2n b\u1eb1ng 0,07 \u0111\u1ed9, con s\u1ed1 do ch\u00ednh m\u1ed9t h\u00e3ng c\u00f4ng b\u1ed1, t\u1ea1o ra kho\u1ea3ng 2,4 cm ch\u00eanh cao tr\u00ean chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh 20 m. Con s\u1ed1 \u0111\u00f3 l\u1edbn h\u01a1n dung sai \u0111\u1ed9 ph\u1eb3ng m\u00e0 t\u1ea5m s\u00e0n \u0111\u01b0\u1ee3c thi c\u00f4ng theo DIN 18202.<\/p>\n<\/li>\n<li style=\"display: flex; gap: 12px; padding: 8px 0; align-items: flex-start;\"><span style=\"color: #c70100; font-weight: bold; font-size: 13px; flex-shrink: 0; margin-top: 1px; font-family: Arial,Helvetica,sans-serif;\">03<\/span>\n<p style=\"font-size: 13px; color: #cccccc; line-height: 1.55; margin: 0; font-family: Arial,Helvetica,sans-serif;\">B\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 ki\u1ec3m tra ngay t\u1ea1i gian h\u00e0ng tri\u1ec3n l\u00e3m trong m\u01b0\u1eddi ph\u00fat. Xin m\u1ed9t b\u1ea3n qu\u00e9t th\u00f4, ch\u01b0a georeference, c\u1ee7a m\u1ed9t h\u00e0nh lang d\u00e0i, c\u1eaft m\u1eb7t c\u1eaft qua s\u00e0n r\u1ed3i \u0111o hai \u0111\u1ea7u. Checklist \u0111\u1ea7y \u0111\u1ee7 n\u1eb1m \u1edf cu\u1ed1i b\u00e0i.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n\n\n\n<p style=\"font-size: 16px; line-height: 1.7; color: #4a4a4a;\">T\u1eeb ng\u00e0y 15 \u0111\u1ebfn 17 th\u00e1ng 9, INTERGEO di\u1ec5n ra t\u1ea1i Munich. Ai \u0111i h\u1ed9i ch\u1ee3 n\u00e0y v\u00e0i n\u0103m li\u1ec1n \u0111\u1ec1u \u0111o\u00e1n \u0111\u01b0\u1ee3c s\u1ebd th\u1ea5y g\u00ec: th\u00eam m\u1ed9t l\u1ee9a th\u01b0\u01a1ng hi\u1ec7u m\u00e1y qu\u00e9t m\u1edbi, s\u1ed1 d\u00f2ng TLS v\u00e0 mobile scanner nhi\u1ec1u h\u01a1n n\u0103m ngo\u00e1i, kh\u1ea3o s\u00e1t laser gh\u00e9p v\u1edbi Gaussian splatting cho k\u1ebft qu\u1ea3 visualize th\u1ef1c s\u1ef1 \u1ea5n t\u01b0\u1ee3ng, th\u00f4ng s\u1ed1 \u0111\u1ed9 ch\u00ednh x\u00e1c n\u1eb1m trong kho\u1ea3ng cho ph\u00e9p, v\u00e0 m\u1ed9t m\u1ee9c gi\u00e1 c\u00f3 khi ch\u1ec9 b\u1eb1ng m\u1ed9t ph\u1ea7n n\u0103m d\u00f2ng m\u00e1y c\u00f3 th\u01b0\u01a1ng hi\u1ec7u. M\u00f9a thu n\u00e0o kh\u00e1ch h\u00e0ng c\u0169ng h\u1ecfi ch\u00fang t\u00f4i \u0111\u00fang m\u1ed9t c\u00e2u tr\u01b0\u1edbc l\u00fac xu\u1ed1ng ti\u1ec1n: \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM c\u00f3 \u0111\u1ee7 cho d\u1ef1 \u00e1n c\u1ee7a h\u1ecd kh\u00f4ng? B\u00e0i vi\u1ebft n\u00e0y l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a ch\u00fang t\u00f4i, d\u1ef1a tr\u00ean ch\u00ednh nh\u1eefng point cloud m\u00e0 kh\u00e1ch h\u00e0ng g\u1eedi cho ch\u00fang t\u00f4i.<\/p>\n\n\n\n<div class=\"wp-block-group\" style=\"border-left: 3px solid #DADADA; padding-left: 18px; margin-bottom: 20px;\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p style=\"font-size: 15px; font-style: italic; line-height: 1.7; color: #4a4a4a;\"><strong>M\u00e1y qu\u00e9t SLAM gi\u00e1 th\u1ea5p th\u1ef1c t\u1ebf ch\u00ednh x\u00e1c \u0111\u1ebfn \u0111\u00e2u?<\/strong> Thi\u1ebft b\u1ecb ph\u00e2n kh\u00fac n\u00e0y th\u01b0\u1eddng c\u00f4ng b\u1ed1 1 \u0111\u1ebfn 3 cm. Trong c\u00e1c point cloud VMT Solutions x\u1eed l\u00fd, sai l\u1ec7ch 3 \u0111\u1ebfn 5 cm ph\u1ed5 bi\u1ebfn h\u01a1n. Nh\u01b0ng ph\u00e1t hi\u1ec7n \u0111\u00e1ng n\u00f3i h\u01a1n n\u1eb1m \u1edf ch\u1ed7 kh\u00e1c: ph\u1ea7n l\u1edbn sai s\u1ed1 n\u00e0y c\u00f3 h\u1ec7 th\u1ed1ng ch\u1ee9 kh\u00f4ng ng\u1eabu nhi\u00ean. C\u00e1c m\u1eb7t ph\u1eb3ng ngang nh\u01b0 s\u00e0n v\u00e0 tr\u1ea7n b\u1ecb d\u1ef1ng nghi\u00eang, n\u00ean sai l\u1ec7ch l\u1edbn d\u1ea7n theo chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh v\u00e0 kh\u00f4ng th\u1ec3 tri\u1ec7t ti\u00eau b\u1eb1ng c\u00e1ch fit m\u1ed9t m\u1eb7t ph\u1eb3ng.<\/p>\n<\/div><\/div>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">N\u1ed9i Dung B\u00e0i Vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Vi_sao_khach_hang_hoi_chung_toi_chu_khong_hoi_hang\" >V\u00ec sao kh\u00e1ch h\u00e0ng h\u1ecfi ch\u00fang t\u00f4i ch\u1ee9 kh\u00f4ng h\u1ecfi h\u00e3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Con_so_tren_datasheet_va_con_so_trong_File\" >Con s\u1ed1 tr\u00ean datasheet v\u00e0 con s\u1ed1 trong File<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Loi_ve_do_chinh_xac_may_quet_SLAM_khong_co_trong_datasheet_mat_phang_ngang_lai_khong_nam_ngang\" >L\u1ed7i v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM kh\u00f4ng c\u00f3 trong datasheet: m\u1eb7t ph\u1eb3ng ngang l\u1ea1i kh\u00f4ng n\u1eb1m ngang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Vi_sao_chua_toi_mot_phan_muoi_do_lai_thanh_nam_centimet\" >V\u00ec sao ch\u01b0a t\u1edbi m\u1ed9t ph\u1ea7n m\u01b0\u1eddi \u0111\u1ed9 l\u1ea1i th\u00e0nh n\u0103m centimet?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Vi_sao_mot_tam_san_nghieng_lai_nghiem_trong_hon_con_so_cua_no\" >V\u00ec sao m\u1ed9t t\u1ea5m s\u00e0n nghi\u00eang l\u1ea1i nghi\u00eam tr\u1ecdng h\u01a1n con s\u1ed1 c\u1ee7a n\u00f3?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Point_cloud_bi_nghieng_gay_ra_chuyen_gi_trong_mo_hinh_BIM\" >Point cloud b\u1ecb nghi\u00eang g\u00e2y ra chuy\u1ec7n g\u00ec trong m\u00f4 h\u00ecnh BIM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Phai_sua_do_nghieng_truoc_khi_dung_mo_hinh\" >Ph\u1ea3i s\u1eeda \u0111\u1ed9 nghi\u00eang tr\u01b0\u1edbc khi d\u1ef1ng m\u00f4 h\u00ecnh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Nam_van_de_con_lai_chung_toi_hay_bao_lai_voi_dang_du_lieu_nay\" >N\u0103m v\u1ea5n \u0111\u1ec1 c\u00f2n l\u1ea1i ch\u00fang t\u00f4i hay b\u00e1o l\u1ea1i v\u1edbi d\u1ea1ng d\u1eef li\u1ec7u n\u00e0y<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Kiem_tra_do_chinh_xac_may_quet_SLAM_truoc_khi_mua_bang_cach_nao\" >Ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM tr\u01b0\u1edbc khi mua b\u1eb1ng c\u00e1ch n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Nhung_thiet_bi_nay_thuc_su_dang_tien_o_dau\" >Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y th\u1ef1c s\u1ef1 \u0111\u00e1ng ti\u1ec1n \u1edf \u0111\u00e2u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Chung_toi_kiem_tra_point_cloud_truoc_khi_bao_gia_khong_phai_sau_khi_dung_mo_hinh\" >Ch\u00fang t\u00f4i ki\u1ec3m tra point cloud tr\u01b0\u1edbc khi b\u00e1o gi\u00e1, kh\u00f4ng ph\u1ea3i sau khi d\u1ef1ng m\u00f4 h\u00ecnh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Buoc_kiem_tra_du_lieu_nguon_cua_chung_toi_gom_nhung_gi\" >B\u01b0\u1edbc ki\u1ec3m tra d\u1eef li\u1ec7u ngu\u1ed3n c\u1ee7a ch\u00fang t\u00f4i g\u1ed3m nh\u1eefng g\u00ec<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#VMTS_doi_tac_point_cloud_to_BIM_cua_ban\" >VMTS, \u0111\u1ed1i t\u00e1c point cloud to BIM c\u1ee7a b\u1ea1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Cau_hoi_thuong_gap_ve_do_chinh_xac_may_quet_SLAM\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Dang_can_nhac_mot_may_quet_moi_Hay_gui_chung_toi_mot_bo_du_lieu_thu_truoc\" >\u0110ang c\u00e2n nh\u1eafc m\u1ed9t m\u00e1y qu\u00e9t m\u1edbi? H\u00e3y g\u1eedi ch\u00fang t\u00f4i m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u th\u1eed tr\u01b0\u1edbc<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/vmts.ch\/vi\/do-chinh-xac-may-quet-slam-point-cloud-bi-nghieng\/#Nguon_tham_khao\" >Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vi_sao_khach_hang_hoi_chung_toi_chu_khong_hoi_hang\"><\/span>V\u00ec sao kh\u00e1ch h\u00e0ng h\u1ecfi ch\u00fang t\u00f4i ch\u1ee9 kh\u00f4ng h\u1ecfi h\u00e3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ch\u00fang t\u00f4i kh\u00f4ng b\u00e1n thi\u1ebft b\u1ecb. Point cloud \u0111\u1ed5 v\u1ec1 ch\u1ed7 ch\u00fang t\u00f4i t\u1eeb \u0111\u1ee7 m\u1ecdi nh\u00f3m m\u00e1y, t\u1eeb m\u00e1y qu\u00e9t laser m\u1eb7t \u0111\u1ea5t, h\u1ec7 SLAM c\u1ea7m tay v\u00e0 \u0111eo l\u01b0ng, cho t\u1edbi n\u1ec1n t\u1ea3ng mobile mapping, photogrammetry v\u00e0 thi\u1ebft b\u1ecb ch\u1ee5p 360 \u0111\u1ed9. Lo\u1ea1i n\u00e0o ch\u00fang t\u00f4i c\u0169ng ph\u1ea3i bi\u1ebfn th\u00e0nh m\u00f4 h\u00ecnh BIM m\u00e0 \u0111\u1ed9i thi\u1ebft k\u1ebf d\u1ef1ng theo \u0111\u01b0\u1ee3c. V\u1ecb tr\u00ed \u0111\u00f3 cho ch\u00fang t\u00f4i m\u1ed9t g\u00f3c nh\u00ecn \u00edt ai c\u00f3. Ch\u00fang t\u00f4i kh\u00f4ng bao gi\u1edd th\u1ea5y b\u1ed9 d\u1eef li\u1ec7u demo. Ch\u00fang t\u00f4i th\u1ea5y d\u1ef1 \u00e1n th\u1ee9 ba c\u1ee7a m\u00f9a, qu\u00e9t trong l\u00fac g\u1ea5p g\u00e1p, trong m\u1ed9t c\u00f4ng tr\u00ecnh h\u00e0nh lang d\u00e0i v\u00e0 kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u GNSS.<\/p>\n\n\n\n<p>C\u0169ng v\u00ec v\u1eady, ch\u00fang t\u00f4i kh\u00f4ng c\u00f4ng b\u1ed1 nh\u1eadn x\u00e9t k\u00e8m t\u00ean thi\u1ebft b\u1ecb, b\u00e0i n\u00e0y c\u0169ng kh\u00f4ng. Nh\u1eefng g\u00ec tr\u00ecnh b\u00e0y d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng l\u1eb7p l\u1ea1i tr\u00ean c\u1ea3 m\u1ed9t nh\u00f3m m\u00e1y, kh\u00f4ng ph\u1ea3i k\u1ebft lu\u1eadn v\u1ec1 b\u1ea5t k\u1ef3 s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3 n\u00e0o. Nhi\u1ec1u h\u1ec7 trong s\u1ed1 \u0111\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u1eafc ch\u1eafn v\u00e0 d\u00f9ng r\u1ea5t \u0111\u01b0\u1ee3c vi\u1ec7c. \u0110i\u1ec1u ch\u00fang t\u00f4i mu\u1ed1n n\u00f3i l\u00e0 chuy\u1ec7n kh\u00e1c: b\u1ea3ng th\u00f4ng s\u1ed1 kh\u00f4ng m\u00f4 t\u1ea3 \u0111\u00fang d\u1ea1ng sai s\u1ed1 m\u00e0 b\u1ea1n s\u1ebd g\u1eb7p ngo\u00e0i c\u00f4ng tr\u01b0\u1eddng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Con_so_tren_datasheet_va_con_so_trong_File\"><\/span>Con s\u1ed1 tr\u00ean datasheet v\u00e0 con s\u1ed1 trong File<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>M\u00e1y SLAM gi\u00e1 th\u1ea5p ph\u00e2n kh\u00fac n\u00e0y c\u00f4ng b\u1ed1 \u0111\u1ed9 ch\u00ednh x\u00e1c quanh m\u1ee9c 1 \u0111\u1ebfn 3 cm. Trong c\u00e1c point cloud ch\u00fang t\u00f4i x\u1eed l\u00fd, sai l\u1ec7ch \u0111o \u0111\u01b0\u1ee3c th\u01b0\u1eddng r\u01a1i v\u00e0o 3 \u0111\u1ebfn 5 cm. Kho\u1ea3ng c\u00e1ch \u0111\u00f3 l\u00e0 th\u1eadt, nh\u01b0ng ri\u00eang n\u00f3 ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 lo\u1ea1i b\u1ecf thi\u1ebft b\u1ecb, v\u00e0 n\u00f3 c\u0169ng x\u1ea5p x\u1ec9 \u0111\u00fang nh\u1eefng g\u00ec t\u00e0i li\u1ec7u nghi\u00ean c\u1ee9u \u0111\u1ed9c l\u1eadp cho th\u1ea5y. M\u1ed9t nghi\u00ean c\u1ee9u so s\u00e1nh n\u0103m 2025 c\u1ee7a \u0110\u1ea1i h\u1ecdc K\u1ef9 thu\u1eadt Praha \u0111o RMSE sau ph\u00e9p bi\u1ebfn \u0111\u1ed5i theo target: 1,2 mm v\u1edbi Leica RTC360 v\u00e0 5,4 mm v\u1edbi Trimble X7, so v\u1edbi 7,3 mm v\u00e0 8,2 mm cho hai h\u1ec7 SLAM th\u1ebf h\u1ec7 hi\u1ec7n t\u1ea1i, v\u00e0 35,3 mm cho m\u1ed9t h\u1ec7 th\u1ebf h\u1ec7 c\u0169. SLAM \u0111\u1ee9ng sau m\u00e1y qu\u00e9t t\u0129nh m\u1ed9t b\u1eadc v\u1ec1 \u0111\u1ed9 l\u1edbn sai s\u1ed1, chuy\u1ec7n n\u00e0y c\u1ea3 ng\u00e0nh \u0111\u1ec1u \u0111\u00e3 ch\u1ea5p nh\u1eadn.<\/p>\n\n\n\n<p>R\u1eafc r\u1ed1i n\u1eb1m \u1edf ch\u1ed7 m\u1ed9t con s\u1ed1 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u01a1n l\u1ebb khi\u1ebfn ng\u01b0\u1eddi \u0111\u1ecdc hi\u1ec3u \u0111\u00e2y l\u00e0 sai s\u1ed1 ng\u1eabu nhi\u00ean, t\u1ee9c nhi\u1ec5u r\u1ea3i \u0111\u1ec1u quanh b\u1ec1 m\u1eb7t th\u1eadt, v\u00e0 ng\u01b0\u1eddi d\u1ef1ng m\u00f4 h\u00ecnh ch\u1ec9 c\u1ea7n fit m\u1ed9t m\u1eb7t ph\u1eb3ng l\u00e0 xong. Th\u1ef1c t\u1ebf kh\u00f4ng ph\u1ea3i v\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Loi_ve_do_chinh_xac_may_quet_SLAM_khong_co_trong_datasheet_mat_phang_ngang_lai_khong_nam_ngang\"><\/span>L\u1ed7i v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM kh\u00f4ng c\u00f3 trong datasheet: m\u1eb7t ph\u1eb3ng ngang l\u1ea1i kh\u00f4ng n\u1eb1m ngang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-group\" style=\"border-left: 3px solid #DADADA; padding-left: 18px; margin-bottom: 20px;\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p style=\"font-size: 15px; font-style: italic; line-height: 1.7; color: #4a4a4a;\">Tr\u00ean ph\u1ea7n l\u1edbn thi\u1ebft b\u1ecb nh\u00f3m n\u00e0y, v\u00e0 g\u1ea7n nh\u01b0 \u1edf m\u1ecdi d\u1ef1 \u00e1n, point cloud g\u1eedi t\u1edbi ch\u1ed7 ch\u00fang t\u00f4i \u0111\u1ec1u b\u1ecb nghi\u00eang. C\u1eaft m\u1ed9t m\u1eb7t c\u1eaft \u0111\u1ee9ng qua t\u1ea5m s\u00e0n hay tr\u1ea7n, b\u1ec1 m\u1eb7t kh\u00f4ng hi\u1ec7n ra nh\u01b0 m\u1ed9t \u0111\u01b0\u1eddng n\u1eb1m ngang c\u00f3 nhi\u1ec5u quanh n\u00f3. N\u00f3 hi\u1ec7n ra nh\u01b0 m\u1ed9t c\u00e1i n\u00eam: hai b\u1ec1 m\u1eb7t ch\u1ee5m v\u00e0o nhau \u1edf m\u1ed9t \u0111\u1ea7u c\u00f4ng tr\u00ecnh v\u00e0 t\u00e1ch ra v\u00e0i centimet \u1edf \u0111\u1ea7u kia.<\/p>\n<\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"lazyload wp-image-slam-nghieng-5cm\" style=\"border-radius: 4px;\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27961%27%20height%3D%27665%27%20viewBox%3D%270%200%20961%20665%27%3E%3Crect%20width%3D%27961%27%20height%3D%27665%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2026\/08\/slam-scanner-accuracy-vertical-drift-5cm-section.png\" alt=\"\u0110\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM: m\u1eb7t c\u1eaft \u0111\u1ee9ng qua t\u1ea5m s\u00e0n cho th\u1ea5y ch\u00eanh cao 5 cm gi\u1eefa hai b\u1ec1 m\u1eb7t qu\u00e9t ch\u1ed3ng nhau\" width=\"961\" height=\"665\" loading=\"lazy\" \/>\n<figcaption class=\"wp-element-caption\" style=\"color: #4a4a4a; font-size: 13px; font-style: italic;\">M\u1eb7t c\u1eaft qua t\u1ea5m s\u00e0n trong m\u1ed9t point cloud SLAM \u0111\u00e3 g\u1ed9p. Hai b\u1ec1 m\u1eb7t l\u1ebd ra ph\u1ea3i tr\u00f9ng kh\u00edt. \u1ede \u0111\u1ea7u n\u00e0y c\u1ee7a c\u00f4ng tr\u00ecnh, ch\u00fang c\u00e1ch nhau 5 cm (VMT Solutions, d\u1eef li\u1ec7u kh\u00e1ch h\u00e0ng \u0111\u00e3 \u1ea9n danh).<\/figcaption>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"lazyload wp-image-slam-nghieng-3cm\" style=\"border-radius: 4px;\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27956%27%20height%3D%27632%27%20viewBox%3D%270%200%20956%20632%27%3E%3Crect%20width%3D%27956%27%20height%3D%27632%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2026\/08\/slam-scanner-accuracy-vertical-drift-3cm-section.png\" alt=\"\u0110\u1ed9 ch\u00ednh x\u00e1c m\u00e1y scan c\u1ea7m tay: c\u00f9ng t\u1ea5m s\u00e0n \u0111o \u1edf v\u1ecb tr\u00ed kh\u00e1c cho sai l\u1ec7ch cao \u0111\u1ed9 3 cm gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t qu\u00e9t\" width=\"956\" height=\"632\" loading=\"lazy\" \/>\n<figcaption class=\"wp-element-caption\" style=\"color: #4a4a4a; font-size: 13px; font-style: italic;\">V\u1eabn t\u1ea5m s\u00e0n \u0111\u00f3, \u0111o \u1edf v\u1ecb tr\u00ed kh\u00e1c: 3 cm. Sai l\u1ec7ch kh\u00f4ng c\u1ed1 \u0111\u1ecbnh m\u00e0 \u0111\u1ed5i theo v\u1ecb tr\u00ed. \u0110\u00fang \u0111\u1eb7c tr\u01b0ng c\u1ee7a m\u1ed9t sai s\u1ed1 nghi\u00eang, kh\u00f4ng ph\u1ea3i m\u1ed9t \u0111\u1ed9 l\u1ec7ch t\u1ecbnh ti\u1ebfn (VMT Solutions).<\/figcaption>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"lazyload wp-image-slam-nghieng-4cm\" style=\"border-radius: 4px;\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271092%27%20height%3D%27609%27%20viewBox%3D%270%200%201092%20609%27%3E%3Crect%20width%3D%271092%27%20height%3D%27609%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2026\/08\/slam-scanner-accuracy-vertical-drift-4cm-section.png\" alt=\"Sai s\u1ed1 drift SLAM trong point cloud to BIM: ch\u00eanh cao 4 cm gi\u1eefa hai l\u01b0\u1ee3t qu\u00e9t tr\u00ean c\u00f9ng m\u1ed9t cao \u0111\u1ed9 s\u00e0n\" width=\"1092\" height=\"609\" loading=\"lazy\" \/>\n<figcaption class=\"wp-element-caption\" style=\"color: #4a4a4a; font-size: 13px; font-style: italic;\">V\u1ecb tr\u00ed th\u1ee9 ba, 4 cm. Ch\u1ec9 trong m\u1ed9t t\u1ea7ng c\u1ee7a m\u1ed9t c\u00f4ng tr\u00ecnh, ch\u00fang t\u00f4i \u0111o \u0111\u01b0\u1ee3c 3, 4 r\u1ed3i 5 cm tr\u00ean th\u1ee9 m\u00e0 v\u1ec1 m\u1eb7t v\u1eadt l\u00fd ch\u1ec9 l\u00e0 m\u1ed9t t\u1ea5m s\u00e0n li\u1ec1n (VMT Solutions).<\/figcaption>\n<\/figure>\n\n\n\n<p>\u0110\u00e2y kh\u00f4ng ph\u1ea3i quan s\u00e1t ri\u00eang c\u1ee7a ch\u00fang t\u00f4i. Nghi\u00ean c\u1ee9u n\u0103m 2023 c\u1ee7a Keitaanniemi v\u00e0 c\u1ed9ng s\u1ef1 t\u1ea1i \u0110\u1ea1i h\u1ecdc Aalto, \u0111\u0103ng tr\u00ean <em>Automation in Construction<\/em>, \u0111\u00e3 ph\u00e2n t\u00edch drift trong kh\u1ea3o s\u00e1t laser SLAM trong nh\u00e0 v\u00e0 ghi nh\u1eadn sai s\u1ed1 drift l\u00ean t\u1edbi 10,6 cm, ch\u1ec9 h\u1ea1 v\u1ec1 0,2 cm sau khi x\u1eed l\u00fd h\u1eadu k\u1ef3 phi c\u1ee9ng theo t\u1eebng \u0111o\u1ea1n. K\u1ebft lu\u1eadn c\u1ed1t l\u00f5i c\u1ee7a h\u1ecd tr\u00f9ng kh\u00edt v\u1edbi ch\u00fang t\u00f4i: <strong>drift ch\u1ee7 y\u1ebfu t\u00e1c \u0111\u1ed9ng theo ph\u01b0\u01a1ng \u0111\u1ee9ng, v\u00e0 l\u1edbn nh\u1ea5t \u1edf gi\u1eefa h\u00e0nh tr\u00ecnh qu\u00e9t<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vi_sao_chua_toi_mot_phan_muoi_do_lai_thanh_nam_centimet\"><\/span>V\u00ec sao ch\u01b0a t\u1edbi m\u1ed9t ph\u1ea7n m\u01b0\u1eddi \u0111\u1ed9 l\u1ea1i th\u00e0nh n\u0103m centimet?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"lazyload wp-image-slam-sai-so-tu-the\" style=\"border-radius: 4px;\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271672%27%20height%3D%27941%27%20viewBox%3D%270%200%201672%20941%27%3E%3Crect%20width%3D%271672%27%20height%3D%27941%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2026\/08\/slam-scanner-accuracy-attitude-error-0-07-degrees.jpg\" alt=\"\u0110\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM: sai s\u1ed1 t\u01b0 th\u1ebf 0,07 \u0111\u1ed9 t\u1ea1o ra 2,4 cm ch\u00eanh cao tr\u00ean 20 m chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh trong point cloud\" width=\"1672\" height=\"941\" loading=\"lazy\" \/>\n<figcaption class=\"wp-element-caption\" style=\"color: #4a4a4a; font-size: 13px; font-style: italic;\">C\u00e1nh tay \u0111\u00f2n ch\u00ednh l\u00e0 c\u00f4ng tr\u00ecnh: \u01b0\u1edbc l\u01b0\u1ee3ng sai ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng 0,07\u00b0 \u0111\u1ee7 n\u00e2ng \u0111\u1ea7u kia c\u1ee7a t\u1ea5m s\u00e0n l\u00ean 2,4 cm. Trong khi \u0111\u00f3 tia laser v\u1eabn \u0111o c\u1ef1 ly ho\u00e0n to\u00e0n chu\u1ea9n (h\u00ecnh minh h\u1ecda nguy\u00ean l\u00fd, VMT Solutions).<\/figcaption>\n<\/figure>\n\n\n\n<p>B\u1ea3n ch\u1ea5t v\u1eadt l\u00fd kh\u00f4ng c\u00f3 g\u00ec b\u00ed \u1ea9n, v\u00e0 hi\u1ec3u n\u00f3 th\u00ec bi\u1ebft ngay ph\u1ea3i ki\u1ec3m tra c\u00e1i g\u00ec. H\u1ec7 SLAM t\u1ef1 x\u00e1c \u0111\u1ecbnh h\u00e0nh tr\u00ecnh c\u1ee7a m\u00ecnh b\u1eb1ng c\u00e1ch kh\u1edbp m\u1ed7i quan s\u00e1t m\u1edbi v\u1edbi nh\u1eefng g\u00ec \u0111\u00e3 ghi nh\u1eadn tr\u01b0\u1edbc \u0111\u00f3, g\u1ea7n gi\u1ed1ng m\u1ed9t \u0111\u01b0\u1eddng chuy\u1ec1n trong tr\u1eafc \u0111\u1ecba. Sai s\u1ed1 nh\u1ecf c\u1ee9 th\u1ebf c\u1ed9ng d\u1ed3n d\u1ecdc \u0111\u01b0\u1eddng \u0111i. Hai trong ba g\u00f3c xoay, roll v\u00e0 pitch, v\u1ec1 nguy\u00ean t\u1eafc kh\u00f4i ph\u1ee5c \u0111\u01b0\u1ee3c t\u1eeb IMU v\u00ec tr\u1ecdng l\u1ef1c cho m\u1ed9t ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng tuy\u1ec7t \u0111\u1ed1i. Kubelka v\u00e0 c\u1ed9ng s\u1ef1 di\u1ec5n \u0111\u1ea1t \u0111i\u1ec1u n\u00e0y trong nghi\u00ean c\u1ee9u n\u0103m 2022 v\u1ec1 \u0111\u0103ng k\u00fd point cloud c\u00f3 r\u00e0ng bu\u1ed9c tr\u1ecdng l\u1ef1c: khi kh\u00f4ng c\u00f3 gia t\u1ed1c kh\u00f4ng \u0111\u1ed5i, vector tr\u1ecdng l\u1ef1c l\u00e0m hai trong ba g\u00f3c t\u01b0 th\u1ebf tr\u1edf n\u00ean quan s\u00e1t \u0111\u01b0\u1ee3c, \u0111\u01b0a b\u00e0i to\u00e1n t\u1eeb s\u00e1u b\u1eadc t\u1ef1 do xu\u1ed1ng b\u1ed1n.<\/p>\n\n\n\n<p>\u0110\u00f3 l\u00e0 tr\u00ean l\u00fd thuy\u1ebft. Ngo\u00e0i th\u1ef1c t\u1ebf, vi\u1ec7c c\u00e2n b\u1eb1ng ch\u1ec9 t\u1ed1t ngang ch\u1ea5t l\u01b0\u1ee3ng IMU v\u00e0 m\u1ee9c hi\u1ec7u chu\u1ea9n c\u1ee7a n\u00f3. Ch\u00ednh t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn hi\u1ec7n tr\u01b0\u1eddng c\u1ee7a m\u1ed9t h\u00e3ng ghi r\u1eb1ng ri\u00eang IMU \u0111\u00e3 \u0111\u00f3ng g\u00f3p kho\u1ea3ng 0,07\u00b0 sai s\u1ed1 c\u00e2n b\u1eb1ng, c\u00f2n c\u00e1c nghi\u00ean c\u1ee9u v\u1edbi IMU c\u1ea5p d\u01b0\u1edbi m\u1ed9t \u0111\u1ed9 th\u01b0\u1eddng l\u1ea5y 0,1\u00b0 l\u00e0m ng\u01b0\u1ee1ng hi\u1ec7u chu\u1ea9n \u0111\u00e1ng k\u1ec3. Nghe qua th\u00ec kh\u00f4ng \u0111\u00e1ng g\u00ec, cho t\u1edbi khi b\u1ea1n nh\u00e2n ch\u00fang theo chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table>\n<thead>\n<tr>\n<th>Sai s\u1ed1 t\u01b0 th\u1ebf (c\u00e2n b\u1eb1ng)<\/th>\n<th>Ch\u00eanh cao tr\u00ean 10 m<\/th>\n<th>Tr\u00ean 20 m<\/th>\n<th>Tr\u00ean 40 m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0,05\u00b0<\/td>\n<td>9 mm<\/td>\n<td>17 mm<\/td>\n<td>35 mm<\/td>\n<\/tr>\n<tr>\n<td><strong>0,07\u00b0<\/strong> (s\u1ed1 li\u1ec7u IMU \u0111\u00e3 c\u00f4ng b\u1ed1)<\/td>\n<td><strong>12 mm<\/strong><\/td>\n<td><strong>24 mm<\/strong><\/td>\n<td><strong>49 mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>0,10\u00b0<\/td>\n<td>17 mm<\/td>\n<td>35 mm<\/td>\n<td>70 mm<\/td>\n<\/tr>\n<tr>\n<td>0,15\u00b0<\/td>\n<td>26 mm<\/td>\n<td>52 mm<\/td>\n<td>105 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figcaption class=\"wp-element-caption\" style=\"color: #4a4a4a; font-size: 13px; font-style: italic;\">Ch\u00eanh cao tr\u00ean m\u1ed9t kho\u1ea3ng ngang \u1ee9ng v\u1edbi m\u1ed9t g\u00f3c nghi\u00eang cho tr\u01b0\u1edbc, t\u00ednh b\u1eb1ng kho\u1ea3ng c\u00e1ch nh\u00e2n tan(g\u00f3c). M\u1ed9t ph\u1ea7n m\u01b0\u1eddi \u0111\u1ed9 cho ra 3,5 cm tr\u00ean chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh 20 m.<\/figcaption>\n<\/figure>\n\n\n\n<p>\u0110\u1ebfn \u0111\u00e2y th\u00ec 3 \u0111\u1ebfn 5 cm ch\u00fang t\u00f4i \u0111o \u0111\u01b0\u1ee3c \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch tr\u1ecdn v\u1eb9n. \u0110\u00e2y kh\u00f4ng ph\u1ea3i v\u1ea5n \u0111\u1ec1 c\u1ee7a ph\u00e9p \u0111o c\u1ef1 ly. Tia laser \u0111o kho\u1ea3ng c\u00e1ch ho\u00e0n to\u00e0n chu\u1ea9n. Thi\u1ebft b\u1ecb ch\u1ec9 kh\u00f4ng bi\u1ebft ch\u00ednh x\u00e1c h\u01b0\u1edbng n\u00e0o l\u00e0 h\u01b0\u1edbng xu\u1ed1ng, v\u00e0 m\u1ecdi sai s\u1ed1 trong \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u00f3 \u0111\u1ec1u b\u1ecb nh\u00e2n l\u00ean theo chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh.<\/p>\n\n\n\n<p>T\u1eeb \u0111\u00f3 r\u00fat ra ba h\u1ec7 qu\u1ea3 th\u1ef1c ti\u1ec5n. Th\u1ee9 nh\u1ea5t, sai s\u1ed1 l\u1edbn d\u1ea7n theo k\u00edch th\u01b0\u1edbc c\u00f4ng tr\u00ecnh, n\u00ean m\u1ed9t bu\u1ed5i demo trong ph\u00f2ng tr\u01b0ng b\u00e0y d\u00e0i 10 m s\u1ebd kh\u00f4ng bao gi\u1edd \u0111\u1ec3 l\u1ed9 n\u00f3. Th\u1ee9 hai, n\u00f3 c\u1ed9ng d\u1ed3n d\u1ecdc h\u00e0nh tr\u00ecnh, n\u00ean n\u1eb7ng nh\u1ea5t \u1edf h\u00e0nh lang d\u00e0i, \u1edf l\u1ed3ng thang, v\u00e0 \u0111\u00fang \u1edf nh\u1eefng c\u00f4ng tr\u00ecnh m\u00e0 h\u1ec7 mobile tr\u00f4ng h\u1ea5p d\u1eabn nh\u1ea5t. Th\u1ee9 ba, v\u00e0 v\u1edbi ch\u00fang t\u00f4i l\u00e0 quan tr\u1ecdng nh\u1ea5t, <strong>\u0111\u00e2y l\u00e0 sai s\u1ed1 h\u1ec7 th\u1ed1ng ch\u1ee9 kh\u00f4ng ph\u1ea3i nhi\u1ec5u<\/strong>, m\u00e0 sai s\u1ed1 h\u1ec7 th\u1ed1ng th\u00ec kh\u00f4ng th\u1ec3 l\u1ea5y trung b\u00ecnh \u0111\u1ec3 tri\u1ec7t ti\u00eau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vi_sao_mot_tam_san_nghieng_lai_nghiem_trong_hon_con_so_cua_no\"><\/span>V\u00ec sao m\u1ed9t t\u1ea5m s\u00e0n nghi\u00eang l\u1ea1i nghi\u00eam tr\u1ecdng h\u01a1n con s\u1ed1 c\u1ee7a n\u00f3?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>H\u00e3y \u0111\u1eb7t 3 \u0111\u1ebfn 5 cm c\u1ea1nh dung sai m\u00e0 ch\u00ednh c\u00f4ng tr\u00ecnh \u0111\u00f3 \u0111\u01b0\u1ee3c thi c\u00f4ng theo. DIN 18202, ti\u00eau chu\u1ea9n \u0110\u1ee9c v\u1ec1 dung sai trong x\u00e2y d\u1ef1ng, quy \u0111\u1ecbnh sai l\u1ec7ch gi\u1edbi h\u1ea1n v\u1ec1 \u0111\u1ed9 ph\u1eb3ng cho s\u00e0n ho\u00e0n thi\u1ec7n (B\u1ea3ng 3, d\u00f2ng 3) l\u00e0 12 mm tr\u00ean kho\u1ea3ng \u0111o 10 m v\u00e0 15 mm tr\u00ean 15 m. T\u1ea1i Th\u1ee5y S\u0129, ti\u00eau chu\u1ea9n t\u01b0\u01a1ng \u1ee9ng l\u00e0 SIA 414\/2:2016. N\u00f3i c\u00e1ch kh\u00e1c, t\u1ea5m s\u00e0n b\u1ea1n \u0111ang qu\u00e9t \u0111\u01b0\u1ee3c thi c\u00f4ng ph\u1eb3ng h\u01a1n sai s\u1ed1 trong point cloud c\u1ee7a b\u1ea1n t\u1eeb hai \u0111\u1ebfn b\u1ed1n l\u1ea7n.<\/p>\n\n\n\n<p>H\u1ec7 qu\u1ea3 kh\u00f4ng d\u1eebng \u1edf chuy\u1ec7n l\u00e0m tr\u00f2n s\u1ed1. H\u1ec7 qu\u1ea3 l\u00e0 <strong>b\u1ea1n kh\u00f4ng c\u00f2n ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c \u0111\u00e2u l\u00e0 sai s\u1ed1 thi\u1ebft b\u1ecb, \u0111\u00e2u l\u00e0 khuy\u1ebft t\u1eadt th\u1eadt c\u1ee7a c\u00f4ng tr\u00ecnh<\/strong>. Khi m\u1eb7t c\u1eaft cho th\u1ea5y s\u00e0n h\u1ea1 4 cm qua m\u1ed9t c\u0103n ph\u00f2ng, \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 l\u00fan l\u1ec7ch, m\u1ed9t d\u1ea7m g\u1ed7 v\u00f5ng, m\u1ed9t l\u1edbp v\u1eefa c\u00e1n n\u1ec1n l\u00e0m \u1ea9u, t\u1ee9c \u0111\u00fang nh\u1eefng th\u1ee9 ch\u1ee7 \u0111\u1ea7u t\u01b0 b\u1ecf ti\u1ec1n kh\u1ea3o s\u00e1t \u0111\u1ec3 t\u00ecm ra. M\u00e0 c\u0169ng c\u00f3 th\u1ec3 ch\u1ec9 l\u00e0 drift t\u01b0 th\u1ebf c\u1ee7a m\u00e1y qu\u00e9t. Ch\u1ec9 nh\u00ecn point cloud th\u00ec kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o t\u00e1ch b\u1ea1ch. V\u1edbi m\u1ed9t d\u1ef1 \u00e1n c\u1ea3i t\u1ea1o, m\u1ed9t \u0111\u00e1nh gi\u00e1 k\u1ebft c\u1ea5u hay m\u1ed9t c\u00f4ng tr\u00ecnh di s\u1ea3n, ch\u00ednh s\u1ef1 m\u1eadp m\u1edd \u0111\u00f3 l\u1ea5y \u0111i ph\u1ea7n l\u1edbn gi\u00e1 tr\u1ecb c\u1ee7a cu\u1ed9c kh\u1ea3o s\u00e1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Point_cloud_bi_nghieng_gay_ra_chuyen_gi_trong_mo_hinh_BIM\"><\/span>Point cloud b\u1ecb nghi\u00eang g\u00e2y ra chuy\u1ec7n g\u00ec trong m\u00f4 h\u00ecnh BIM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ebfn \u0111\u00e2y, \u0111\u1ed9 nghi\u00eang m\u1edbi ch\u1ec9 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111o \u0111\u1ea1c. K\u1ec3 t\u1eeb l\u00fac point cloud bi\u1ebfn th\u00e0nh m\u00f4 h\u00ecnh BIM, n\u00f3 th\u00e0nh v\u1ea5n \u0111\u1ec1 thi\u1ebft k\u1ebf, v\u00e0 l\u00e0 lo\u1ea1i v\u1ea5n \u0111\u1ec1 m\u00e0 nh\u00ecn v\u00e0o m\u00f4 h\u00ecnh ho\u00e0n ch\u1ec9nh kh\u00f4ng c\u00f2n th\u1ea5y \u0111\u01b0\u1ee3c n\u1eefa.<\/p>\n\n\n\n<p>Ng\u01b0\u1eddi ta d\u1ef1ng m\u00f4 h\u00ecnh b\u00e1m theo point cloud. M\u1ecdi chi\u1ec1u cao t\u1ea7ng, m\u1ecdi cao \u0111\u1ed9 b\u1ec7 c\u1eeda v\u00e0 lanh t\u00f4, m\u1ecdi b\u1ec1 d\u00e0y s\u00e0n, m\u1ecdi \u0111\u1ed9 d\u1ed1c m\u00e1i v\u00e0 m\u1ecdi cao \u0111\u1ed9 \u0111i\u1ec3m \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb b\u1ec1 m\u1eb7t n\u1eb1m \u1edf ch\u1ed7 m\u00e0 m\u00e1y qu\u00e9t \u0111\u1eb7t n\u00f3 v\u00e0o. B\u1ec1 m\u1eb7t \u1ea5y nghi\u00eang th\u00ec m\u00f4 h\u00ecnh ti\u1ebfp nh\u1eadn \u0111\u1ed9 nghi\u00eang \u0111\u00f3, c\u1ea5u ki\u1ec7n n\u00e0y qua c\u1ea5u ki\u1ec7n kh\u00e1c. K\u1ebft qu\u1ea3 sau c\u00f9ng tr\u00f4ng kh\u00f4ng ch\u00ea v\u00e0o \u0111\u00e2u \u0111\u01b0\u1ee3c: t\u01b0\u1eddng s\u1ea1ch, h\u1ec7 t\u1ea7ng s\u1ea1ch, m\u1ed9t m\u00f4 h\u00ecnh ki\u1ec3m tra v\u00e0 xu\u1ea5t File b\u00ecnh th\u01b0\u1eddng. T\u1eaft point cloud \u0111i, l\u1ed7i tr\u1edf n\u00ean v\u00f4 h\u00ecnh v\u00e0 kh\u00f4ng c\u00f2n truy ng\u01b0\u1ee3c \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p>Nh\u01b0ng n\u00f3 v\u1eabn \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i. Ai l\u1ea5y m\u1ed9t cao \u0111\u1ed9 t\u1eeb m\u00f4 h\u00ecnh, d\u1ef1ng m\u1ed9t m\u1eb7t c\u1eaft, b\u00f3c m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng hay \u0111\u1eb7t s\u1ea3n xu\u1ea5t m\u1ed9t c\u1ea5u ki\u1ec7n theo m\u00f4 h\u00ecnh \u0111\u00f3 \u0111\u1ec1u \u0111ang t\u00ednh to\u00e1n ti\u1ebfp tr\u00ean \u0111\u1ed9 nghi\u00eang \u1ea5y m\u00e0 kh\u00f4ng h\u1ec1 bi\u1ebft. V\u00ec v\u1eady, v\u1edbi thi\u1ebft k\u1ebf chi ti\u1ebft trong c\u00f4ng tr\u00ecnh hi\u1ec7n h\u1eefu, point cloud b\u1ecb nghi\u00eang kh\u00f4ng ph\u1ea3i m\u1ed9t khi\u1ebfm khuy\u1ebft ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 th\u1ec3 t\u1eb7c l\u01b0\u1ee1i cho qua. N\u00f3 l\u00e0 l\u00fd do \u0111\u1ec3 d\u1eebng l\u1ea1i, ch\u1eebng n\u00e0o ch\u01b0a \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Phai_sua_do_nghieng_truoc_khi_dung_mo_hinh\"><\/span>Ph\u1ea3i s\u1eeda \u0111\u1ed9 nghi\u00eang tr\u01b0\u1edbc khi d\u1ef1ng m\u00f4 h\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ed9 nghi\u00eang kh\u00f4ng ph\u1ea3i vi\u1ec7c c\u1ee7a ng\u01b0\u1eddi d\u1ef1ng m\u00f4 h\u00ecnh. \u0110\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 c\u1ee7a d\u1eef li\u1ec7u, v\u00e0 ph\u1ea3i gi\u1ea3i quy\u1ebft xong tr\u01b0\u1edbc khi v\u1ebd b\u1ee9c t\u01b0\u1eddng \u0111\u1ea7u ti\u00ean, kh\u00f4ng ph\u1ea3i v\u1eeba v\u1ebd v\u1eeba s\u1eeda, c\u00e0ng kh\u00f4ng ph\u1ea3i s\u1eeda sau. N\u1ebfu ph\u00e1t hi\u1ec7n ra khi m\u00f4 h\u00ecnh \u0111\u00e3 xong th\u00ec th\u1ee9 ch\u1edd b\u1ea1n kh\u00f4ng ph\u1ea3i m\u1ed9t l\u1ea7n hi\u1ec7u ch\u1ec9nh, m\u00e0 l\u00e0 d\u1ef1ng l\u1ea1i t\u1eeb \u0111\u1ea7u.<\/p>\n\n\n\n<p>D\u1ec5 x\u1eed l\u00fd nh\u1ea5t l\u00e0 khi c\u00e1c tr\u1ea1m qu\u00e9t ri\u00eang l\u1ebb ho\u1eb7c c\u00e1c \u0111o\u1ea1n h\u00e0nh tr\u00ecnh v\u1eabn c\u00f2n. Nghi\u00ean c\u1ee9u c\u1ee7a Aalto h\u1ea1 \u0111\u01b0\u1ee3c 10,6 cm xu\u1ed1ng 0,2 cm ch\u00ednh b\u1eb1ng c\u00e1ch c\u1eaft h\u00e0nh tr\u00ecnh th\u00e0nh c\u00e1c \u0111o\u1ea1n kho\u1ea3ng 30 gi\u00e2y r\u1ed3i \u00e1p m\u1ed9t ph\u00e9p bi\u1ebfn \u0111\u1ed5i phi c\u1ee9ng cho t\u1eebng \u0111o\u1ea1n. \u0110i\u1ec3m kh\u1ed1ng ch\u1ebf \u0111o b\u1eb1ng m\u00e1y to\u00e0n \u0111\u1ea1c c\u0169ng cho k\u1ebft qu\u1ea3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, v\u00e0 \u0111\u00f3 l\u00e0 l\u00fd do m\u1ecdi quy tr\u00ecnh mobile mapping nghi\u00eam t\u00fac \u0111\u1ec1u c\u00f3 ch\u00fang.<\/p>\n\n\n\n<p>Tuy v\u1eady, th\u1ee9 \u0111\u1ebfn b\u00e0n l\u00e0m vi\u1ec7c c\u1ee7a ch\u00fang t\u00f4i r\u1ea5t th\u01b0\u1eddng xuy\u00ean ch\u1ec9 l\u00e0 m\u1ed9t File E57 ho\u1eb7c LAS \u0111\u00e3 g\u1ed9p, kh\u00f4ng h\u00e0nh tr\u00ecnh, kh\u00f4ng ranh gi\u1edbi tr\u1ea1m qu\u00e9t, kh\u00f4ng \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf. \u0110\u1ebfn b\u01b0\u1edbc n\u00e0y th\u00ec c\u00f4ng c\u1ee5 th\u00f4ng th\u01b0\u1eddng kh\u00f4ng xoay x\u1edf \u0111\u01b0\u1ee3c n\u1eefa. Kh\u00f4ng ph\u00e9p bi\u1ebfn \u0111\u1ed5i c\u1ee9ng n\u00e0o c\u00e2n b\u1eb1ng \u0111\u01b0\u1ee3c m\u1ed9t \u0111\u1ea7u c\u00f4ng tr\u00ecnh m\u00e0 kh\u00f4ng l\u00e0m nghi\u00eang \u0111\u1ea7u kia, v\u00e0 c\u0169ng kh\u00f4ng c\u00f3 ch\u1ee9c n\u0103ng t\u1ef1 \u0111\u1ed9ng n\u00e0o l\u00e0m thay b\u1ea1n.<\/p>\n\n\n\n<p>C\u00e1i c\u00f2n l\u1ea1i l\u00e0 hi\u1ec7u ch\u1ec9nh th\u1ee7 c\u00f4ng: b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, m\u1ed9t quy tr\u00ecnh \u0111\u01b0\u1ee3c \u0111\u1ecbnh s\u1eb5n cho vi\u1ec7c n\u00e0y, v\u00e0 nh\u1eefng Geomatiker \u0111\u00e3 x\u1eed l\u00fd \u0111\u1ee7 nhi\u1ec1u d\u1eef li\u1ec7u c\u00f9ng d\u1ea1ng. C\u00e1i kh\u00f3 th\u1eadt s\u1ef1 kh\u00f4ng n\u1eb1m \u1edf ph\u00e9p t\u00ednh, m\u00e0 \u1edf ph\u00e1n \u0111o\u00e1n. M\u1eb7t ph\u1eb3ng n\u00e0o trong c\u00f4ng tr\u00ecnh \u0111\u1ee7 tin c\u1eady \u0111\u1ec3 l\u00e0m chu\u1ea9n cao \u0111\u1ed9, m\u1eb7t ph\u1eb3ng n\u00e0o b\u1ea3n th\u00e2n n\u00f3 \u0111\u00e3 bi\u1ebfn d\u1ea1ng? Drift c\u1ee7a thi\u1ebft b\u1ecb d\u1eebng \u1edf \u0111\u00e2u v\u00e0 l\u00fan th\u1eadt c\u1ee7a c\u00f4ng tr\u00ecnh b\u1eaft \u0111\u1ea7u t\u1eeb \u0111\u00e2u? Kho\u1ea3ng ph\u00e2n \u0111\u1ecbnh \u0111\u00f3 kh\u00f4ng t\u1ef1 \u0111\u1ed9ng h\u00f3a \u0111\u01b0\u1ee3c, v\u00e0 ch\u00ednh n\u00f3 quy\u1ebft \u0111\u1ecbnh point cloud sau hi\u1ec7u ch\u1ec9nh l\u00e0 d\u00f9ng \u0111\u01b0\u1ee3c hay ch\u1ec9 sai theo m\u1ed9t ki\u1ec3u kh\u00e1c. K\u1ebft th\u00fac c\u00f4ng vi\u1ec7c n\u00e0y, b\u1ea1n nh\u1eadn l\u1ea1i m\u1ed9t point cloud \u0111\u00e3 c\u00e2n b\u1eb1ng \u0111\u1ec3 d\u1ef1ng m\u00f4 h\u00ecnh, k\u00e8m bi\u00ean b\u1ea3n ghi r\u00f5 \u0111\u00e3 hi\u1ec7u ch\u1ec9nh nh\u1eefng g\u00ec v\u00e0 l\u1ea5y g\u00ec l\u00e0m chu\u1ea9n.<\/p>\n\n\n\n<div class=\"wp-block-group has-background\" style=\"background-color: #f5f5f5; border-left: 3px solid #C70100; padding: 20px 24px 20px 24px;\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p style=\"font-size: 10px; font-style: normal; font-weight: bold; letter-spacing: 0.12em; text-transform: uppercase; color: #c70100;\">L\u01b0u \u00fd th\u1ef1c h\u00e0nh c\u1ee7a VMTS<\/p>\n\n\n\n<p style=\"font-size: 20px; font-weight: bold; line-height: 1.3; color: #000000;\">H\u00e3y lu\u00f4n g\u1eedi k\u00e8m c\u00e1c b\u1ea3n qu\u00e9t ri\u00eang l\u1ebb ho\u1eb7c c\u00e1c \u0111o\u1ea1n h\u00e0nh tr\u00ecnh, \u0111\u1eebng ch\u1ec9 g\u1eedi point cloud \u0111\u00e3 g\u1ed9p.<\/p>\n\n\n\n<p style=\"color: #4a4a4a;\">Gi\u1eef l\u1ea1i project g\u1ed1c b\u00ean c\u1ea1nh File xu\u1ea5t kh\u00f4ng t\u1ed1n g\u00ec c\u1ee7a b\u1ea1n \u1edf th\u1eddi \u0111i\u1ec3m kh\u1ea3o s\u00e1t, nh\u01b0ng b\u1ea3o to\u00e0n m\u1ecdi l\u1ef1a ch\u1ecdn v\u1ec1 sau. Nh\u1edd \u0111\u00f3 ch\u00fang t\u00f4i ph\u00e1t hi\u1ec7n v\u00e0 lo\u1ea1i \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea3n qu\u00e9t l\u1ec7ch, hi\u1ec7u ch\u1ec9nh \u0111\u1ed9 nghi\u00eang theo t\u1eebng \u0111o\u1ea1n, v\u00e0 n\u00f3i cho b\u1ea1n bi\u1ebft sai l\u1ec7ch n\u00e0o thu\u1ed9c v\u1ec1 c\u00f4ng tr\u00ecnh, sai l\u1ec7ch n\u00e0o thu\u1ed9c v\u1ec1 thi\u1ebft b\u1ecb. File \u0111\u00e3 g\u1ed9p th\u00ec ti\u1ec7n g\u1eedi, nh\u01b0ng \u0111\u1eaft \u0111\u1ec3 s\u1eeda.<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nam_van_de_con_lai_chung_toi_hay_bao_lai_voi_dang_du_lieu_nay\"><\/span>N\u0103m v\u1ea5n \u0111\u1ec1 c\u00f2n l\u1ea1i ch\u00fang t\u00f4i hay b\u00e1o l\u1ea1i v\u1edbi d\u1ea1ng d\u1eef li\u1ec7u n\u00e0y<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ed9 nghi\u00eang l\u00e0 th\u1ee9 khi\u1ebfn ch\u00fang t\u00f4i lo nh\u1ea5t, v\u00ec n\u00f3 c\u00f3 h\u1ec7 th\u1ed1ng v\u00e0 g\u1ea7n nh\u01b0 kh\u00f4ng l\u1ed9 ra trong ph\u1ea7n m\u1ec1m xem. Nh\u1eefng v\u1ea5n \u0111\u1ec1 c\u00f2n l\u1ea1i b\u00ecnh th\u01b0\u1eddng h\u01a1n, nh\u01b0ng c\u00e1i n\u00e0o c\u0169ng t\u1ed1n th\u1eddi gian d\u1ef1ng m\u00f4 h\u00ecnh n\u1ebfu kh\u00f4ng b\u1eaft \u0111\u01b0\u1ee3c tr\u01b0\u1edbc khi b\u1eaft tay v\u00e0o vi\u1ec7c. \u0110\u00e2y l\u00e0 danh s\u00e1ch c\u00e1c Geomatiker c\u1ee7a ch\u00fang t\u00f4i r\u00e0 tr\u00ean d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>M\u1ed9t b\u1ea3n qu\u00e9t l\u1ec7ch n\u1eb1m l\u1eabn trong b\u1ed9 \u0111\u00e3 g\u1ed9p.<\/strong> M\u1ed9t tr\u1ea1m qu\u00e9t kh\u1edbp l\u1ec7ch v\u00e0i centimet so v\u1edbi ph\u1ea7n c\u00f2n l\u1ea1i v\u00e0 k\u00e9o theo h\u00ecnh h\u1ecdc quanh n\u00f3. Trong File \u0111\u00e3 g\u1ed9p, th\u01b0\u1eddng lo\u1ea1i b\u1ecf d\u1ec5 h\u01a1n hi\u1ec7u ch\u1ec9nh, mi\u1ec5n l\u00e0 c\u00f2n x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u0111i\u1ec3m n\u00e0o thu\u1ed9c b\u1ea3n qu\u00e9t \u0111\u00f3.<\/li>\n<li><strong>M\u1ed1c 0.00 kh\u00f4ng n\u1eb1m \u1edf t\u1ea7ng tr\u1ec7t.<\/strong> Cao \u0111\u1ed9 g\u1ed1c c\u1ee7a d\u1ef1 \u00e1n r\u01a1i v\u00e0o m\u1ed9t m\u1ee9c t\u00f9y ti\u1ec7n, n\u00ean m\u1ecdi t\u1ea7ng v\u00e0 m\u1ecdi k\u00edch th\u01b0\u1edbc trong m\u00f4 h\u00ecnh \u0111\u1ec1u ph\u1ea3i quy chi\u1ebfu l\u1ea1i tr\u01b0\u1edbc khi kh\u00e1ch h\u00e0ng d\u00f9ng \u0111\u01b0\u1ee3c.<\/li>\n<li><strong>Point cloud n\u1eb1m qu\u00e1 xa g\u1ed1c t\u1ecda \u0111\u1ed9.<\/strong> T\u1ecda \u0111\u1ed9 nh\u00e0 n\u01b0\u1edbc \u00e1p th\u1eb3ng v\u00e0o s\u1ebd \u0111\u1eb7t h\u00ecnh h\u1ecdc c\u00e1ch g\u1ed1c h\u00e0ng ch\u1ee5c ngh\u00ecn m\u00e9t. \u1ede kho\u1ea3ng c\u00e1ch \u0111\u00f3, ph\u1ea7n l\u1edbn ph\u1ea7n m\u1ec1m BIM m\u1ea5t \u0111\u1ed9 ch\u00ednh x\u00e1c t\u00ednh to\u00e1n v\u00e0 sinh ra l\u1ed7i l\u00e0m tr\u00f2n c\u0169ng nh\u01b0 l\u1ed7i b\u1eaft \u0111i\u1ec3m khi d\u1ef1ng.<\/li>\n<li><strong>Kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u ph\u00eda tr\u00ean m\u00e1i.<\/strong> B\u1ec1 d\u00e0y c\u1ea5u t\u1ea1o m\u00e1i khi \u0111\u00f3 ph\u1ea3i suy ra t\u1eeb m\u1eb7t d\u01b0\u1edbi nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c. \u0110\u00f3 l\u00e0 m\u1ed9t gi\u1ea3 \u0111\u1ecbnh trong m\u00f4 h\u00ecnh, kh\u00f4ng ph\u1ea3i ph\u00e9p \u0111o, v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c ghi r\u00f5 l\u00e0 gi\u1ea3 \u0111\u1ecbnh.<\/li>\n<li><strong>Kh\u00f4ng c\u00f3 \u1ea3nh tham chi\u1ebfu.<\/strong> Thi\u1ebfu \u1ea3nh hi\u1ec7n tr\u1ea1ng th\u00ec nh\u1eefng v\u00f9ng point cloud m\u1eadp m\u1edd kh\u00f4ng th\u1ec3 gi\u1ea3i quy\u1ebft, ng\u01b0\u1eddi d\u1ef1ng m\u00f4 h\u00ecnh bu\u1ed9c ph\u1ea3i \u0111o\u00e1n. \u0110\u00f3 l\u00e0 l\u00fd do d\u1ef1 \u00e1n n\u00e0o ch\u00fang t\u00f4i c\u0169ng xin \u1ea3nh.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kiem_tra_do_chinh_xac_may_quet_SLAM_truoc_khi_mua_bang_cach_nao\"><\/span>Ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM tr\u01b0\u1edbc khi mua b\u1eb1ng c\u00e1ch n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Kh\u00f4ng \u0111i\u1ec1u n\u00e0o \u1edf tr\u00ean c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n kh\u00f4ng n\u00ean mua. N\u00f3 ch\u1ec9 c\u00f3 ngh\u0129a bu\u1ed5i demo t\u1ea1i gian h\u00e0ng kh\u00f4ng ph\u1ea3i ph\u00e9p th\u1eed tr\u1ea3 l\u1eddi \u0111\u01b0\u1ee3c c\u00e2u h\u1ecfi c\u1ee7a b\u1ea1n. S\u00e1u th\u1ee9 n\u00ean y\u00eau c\u1ea7u, v\u00e0 m\u1ed9t nh\u00e0 cung c\u1ea5p t\u1ef1 tin s\u1ebd \u0111\u1ed3ng \u00fd v\u1edbi c\u1ea3 s\u00e1u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Xin b\u1ed9 d\u1eef li\u1ec7u th\u00f4, ch\u01b0a georeference.<\/strong> Kh\u00f4ng ph\u1ea3i b\u1ed9 m\u1eabu \u0111\u00e3 ch\u1ec9nh chu, kh\u00f4ng ph\u1ea3i b\u1ea3n \u0111\u00e3 hi\u1ec7u ch\u1ec9nh RTK, c\u0169ng kh\u00f4ng ph\u1ea3i b\u1ea3n render Gaussian splatting. Ch\u1ea5t l\u01b0\u1ee3ng th\u1ecb gi\u00e1c v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c h\u00ecnh h\u1ecdc l\u00e0 hai thu\u1ed9c t\u00ednh t\u00e1ch r\u1eddi nhau: m\u1ed9t b\u1ea3n splat tr\u00f4ng nh\u01b0 \u1ea3nh ch\u1ee5p m\u00e0 h\u00ecnh h\u1ecdc b\u00ean d\u01b0\u1edbi v\u1eabn drift. H\u00e3y \u0111\u00f2i \u0111\u00fang point cloud m\u00e0 engine SLAM t\u1ef1 sinh ra.<\/li>\n<li><strong>H\u1ecfi con s\u1ed1 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u00f3 n\u00f3i v\u1ec1 c\u00e1i g\u00ec.<\/strong> Ph\u1ea7n l\u1edbn con s\u1ed1 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 m\u00f4 t\u1ea3 \u0111\u1ed9 ch\u00ednh x\u00e1c <em>t\u01b0\u01a1ng \u0111\u1ed1i<\/em>, t\u1ee9c m\u1ee9c nh\u1ea5t qu\u00e1n n\u1ed9i b\u1ed9 tr\u00ean m\u1ed9t c\u1ef1 ly cho s\u1eb5n, th\u01b0\u1eddng quanh m\u1ee9c 1 cm trong 100 m. \u0110\u1ed9 ch\u00ednh x\u00e1c tuy\u1ec7t \u0111\u1ed1i, con s\u1ed1 th\u1eadt s\u1ef1 quan tr\u1ecdng khi m\u00f4 h\u00ecnh ph\u1ea3i kh\u1edbp v\u1edbi kh\u1ea3o s\u00e1t tr\u1eafc \u0111\u1ecba, th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi RTK ho\u1eb7c \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf, v\u00e0 l\u00e0 m\u1ed9t con s\u1ed1 kh\u00e1c h\u1eb3n. N\u1ebfu datasheet kh\u00f4ng ph\u00e2n bi\u1ec7t hai lo\u1ea1i, h\u00e3y h\u1ecfi th\u1eb3ng con s\u1ed1 in tr\u00ean \u0111\u00f3 l\u00e0 lo\u1ea1i n\u00e0o.<\/li>\n<li><strong>Ki\u1ec3m tra \u0111\u1ed9 c\u00e2n b\u1eb1ng tr\u1ef1c ti\u1ebfp.<\/strong> Qu\u00e9t m\u1ed9t h\u00e0nh lang d\u00e0i ho\u1eb7c m\u1ed9t m\u1eb7t s\u00e0n l\u1edbn, c\u1eaft m\u1eb7t c\u1eaft \u0111\u1ee9ng qua t\u1ea5m s\u00e0n r\u1ed3i \u0111o cao \u0111\u1ed9 hai \u0111\u1ea7u. C\u00f4ng tr\u00ecnh n\u00e0o d\u00e0i tr\u00ean kho\u1ea3ng 20 m c\u0169ng \u0111\u1ee7 l\u00e0m l\u1ed9 sai s\u1ed1 t\u01b0 th\u1ebf c\u1ee1 m\u1ed9t ph\u1ea7n m\u01b0\u1eddi \u0111\u1ed9.<\/li>\n<li><strong>Ki\u1ec3m tra khi kh\u00f4ng c\u00f3 loop closure.<\/strong> \u0110i h\u1ebft tuy\u1ebfn r\u1ed3i quay l\u1ea1i \u0111\u00fang \u0111\u01b0\u1eddng c\u0169, kh\u00f4ng v\u1ec1 \u0111i\u1ec3m xu\u1ea5t ph\u00e1t t\u1eeb m\u1ed9t h\u01b0\u1edbng kh\u00e1c, v\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 t\u00ecnh hu\u1ed1ng loop closure th\u01b0\u1eddng kh\u00f4ng k\u00edch ho\u1ea1t. C\u0169ng l\u00e0 t\u00ecnh hu\u1ed1ng b\u00ecnh th\u01b0\u1eddng trong m\u1ed9t c\u00f4ng tr\u00ecnh d\u1ea1ng tuy\u1ebfn.<\/li>\n<li><strong>Qu\u00e9t c\u00f9ng m\u1ed9t kh\u00f4ng gian hai l\u1ea7n r\u1ed3i so hai point cloud.<\/strong> T\u00ednh l\u1eb7p l\u1ea1i l\u00e0 ch\u1ec9 b\u00e1o r\u1ebb nh\u1ea5t cho sai s\u1ed1 h\u1ec7 th\u1ed1ng, m\u00e0 l\u1ea1i ch\u1eb3ng c\u1ea7n d\u1eef li\u1ec7u tham chi\u1ebfu n\u00e0o. Hai l\u01b0\u1ee3t qu\u00e9t c\u00f9ng m\u1ed9t h\u00e0nh lang l\u1ec7ch nhau 4 cm th\u00ec b\u1ea1n \u0111\u00e3 c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi.<\/li>\n<li><strong>H\u1ecfi File xu\u1ea5t g\u1ed3m nh\u1eefng g\u00ec.<\/strong> H\u00e0nh tr\u00ecnh, c\u00e1c \u0111o\u1ea1n qu\u00e9t ri\u00eang l\u1ebb, sai s\u1ed1 d\u01b0 t\u1ea1i \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf, m\u1ed9t b\u00e1o c\u00e1o ch\u1ea5t l\u01b0\u1ee3ng. N\u1ebfu s\u1ea3n ph\u1ea9m giao duy nh\u1ea5t l\u00e0 point cloud \u0111\u00e3 g\u1ed9p, m\u1ecdi kh\u1ea3 n\u0103ng hi\u1ec7u ch\u1ec9nh v\u1ec1 sau \u0111\u00e3 b\u1ecb kh\u00f3a l\u1ea1i ngay t\u1eeb \u0111\u1ea7u.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nhung_thiet_bi_nay_thuc_su_dang_tien_o_dau\"><\/span>Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y th\u1ef1c s\u1ef1 \u0111\u00e1ng ti\u1ec1n \u1edf \u0111\u00e2u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>K\u1ebft b\u00e0i \u1edf ph\u00eda ti\u00eau c\u1ef1c th\u00ec kh\u00f4ng s\u00f2ng ph\u1eb3ng. Sai s\u1ed1 drift theo ph\u01b0\u01a1ng \u0111\u1ee9ng n\u1eb7ng n\u1ec1 v\u1edbi s\u1ea3n ph\u1ea9m n\u00e0y nh\u01b0ng g\u1ea7n nh\u01b0 v\u00f4 h\u1ea1i v\u1edbi s\u1ea3n ph\u1ea9m kh\u00e1c, v\u00e0 n\u00ean bi\u1ebft r\u00f5 ranh gi\u1edbi \u0111\u00f3 tr\u01b0\u1edbc khi g\u1ea1t b\u1ecf m\u1ed9t thi\u1ebft b\u1ecb ch\u1ec9 b\u1eb1ng m\u1ed9t ph\u1ea7n n\u0103m gi\u00e1 ph\u01b0\u01a1ng \u00e1n c\u00f2n l\u1ea1i.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"lazyload wp-image-slam-pham-vi-su-dung\" style=\"border-radius: 4px;\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271672%27%20height%3D%27941%27%20viewBox%3D%270%200%201672%20941%27%3E%3Crect%20width%3D%271672%27%20height%3D%27941%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2026\/08\/slam-suitability-lod-100-200-vs-lod-300-precision.jpg\" alt=\"Khi n\u00e0o SLAM l\u00e0 \u0111\u1ee7 v\u00e0 khi n\u00e0o kh\u00f4ng: LOD 100 \u0111\u1ebfn 200 ch\u1ea5p nh\u1eadn drift 3 \u0111\u1ebfn 5 cm, c\u00f2n LOD 300 c\u1ea7n \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc 15 mm\" width=\"1672\" height=\"941\" loading=\"lazy\" \/>\n<figcaption class=\"wp-element-caption\" style=\"color: #4a4a4a; font-size: 13px; font-style: italic;\">Quy\u1ebft \u0111\u1ecbnh kh\u00f4ng n\u1eb1m \u1edf thi\u1ebft b\u1ecb m\u00e0 \u1edf s\u1ea3n ph\u1ea9m \u0111\u1ea7u ra: v\u1edbi b\u00f3c t\u00e1ch di\u1ec7n t\u00edch, h\u1ed3 s\u01a1 hi\u1ec7n tr\u1ea1ng v\u00e0 m\u00f4 h\u00ecnh LOD 100 \u0111\u1ebfn 200, drift 3 \u0111\u1ebfn 5 cm kh\u00f4ng \u1ea3nh h\u01b0\u1edfng. T\u1eeb LOD 300 v\u00e0 trong ti\u1ec1n ch\u1ebf, m\u1ed1c &plusmn;15 mm m\u1edbi l\u00e0 th\u1ee9 quy\u1ebft \u0111\u1ecbnh, v\u00e0 ch\u1ec9 kh\u1ea3o s\u00e1t c\u00f3 \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf m\u1edbi g\u00e1nh n\u1ed5i (VMT Solutions).<\/figcaption>\n<\/figure>\n\n\n\n<p>Sai s\u1ed1 n\u00e0y g\u1ea7n nh\u01b0 kh\u00f4ng \u0111\u00e1ng k\u1ec3 \u1edf: b\u00f3c t\u00e1ch kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 di\u1ec7n t\u00edch, l\u1eadp h\u1ed3 s\u01a1 hi\u1ec7n tr\u1ea1ng v\u00e0 ki\u1ec3m k\u00ea t\u00e0i s\u1ea3n, ghi nh\u1eadn tr\u1ef1c quan hi\u1ec7n tr\u01b0\u1eddng v\u00e0 ti\u1ebfn \u0111\u1ed9, ki\u1ec3m tra xung \u0111\u1ed9t v\u1edbi dung sai r\u1ed9ng, nghi\u00ean c\u1ee9u kh\u1ea3 thi, v\u00e0 d\u1ef1ng m\u00f4 h\u00ecnh LOD 100 \u0111\u1ebfn LOD 200 n\u01a1i v\u00e0i centimet tr\u00ean m\u1ed9t m\u1eb7t \u0111\u1ee9ng kh\u00f4ng l\u00e0m \u0111\u1ed5i quy\u1ebft \u0111\u1ecbnh n\u00e0o. \u1ede nh\u1eefng vi\u1ec7c n\u00e0y, l\u1ee3i \u00edch n\u0103ng su\u1ea5t c\u1ee7a vi\u1ec7c \u0111i b\u1ed9 kh\u1ea3o s\u00e1t c\u1ea3 c\u00f4ng tr\u00ecnh trong hai m\u01b0\u01a1i ph\u00fat l\u00e0 c\u00f3 th\u1eadt v\u00e0 r\u1ea5t \u0111\u00e1ng k\u1ec3. Ch\u00fang t\u00f4i v\u1eabn x\u1eed l\u00fd lo\u1ea1i d\u1eef li\u1ec7u n\u00e0y th\u01b0\u1eddng xuy\u00ean v\u1edbi k\u1ebft qu\u1ea3 t\u1ed1t.<\/p>\n\n\n\n<p>Ng\u01b0\u1ee3c l\u1ea1i, kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn \u1edf: thi\u1ebft k\u1ebf chi ti\u1ebft LOD 300, khi \u0111\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc &plusmn;15 mm ch\u00fang t\u00f4i cam k\u1ebft c\u00f2n nh\u1ecf h\u01a1n ch\u00ednh sai s\u1ed1 drift; ti\u1ec1n ch\u1ebf v\u00e0 ho\u00e0n thi\u1ec7n, khi c\u1ea5u ki\u1ec7n \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo m\u00f4 h\u00ecnh; \u0111\u00e1nh gi\u00e1 k\u1ebft c\u1ea5u v\u00e0 l\u00fan, n\u01a1i m\u1ee5c \u0111\u00edch duy nh\u1ea5t l\u00e0 \u0111o cho ra sai l\u1ec7ch th\u1eadt; h\u1ed3 s\u01a1 di s\u1ea3n; v\u00e0 b\u1ea5t k\u1ef3 s\u1ea3n ph\u1ea9m n\u00e0o ph\u1ea3i kh\u1edbp v\u1edbi kh\u1ea3o s\u00e1t tr\u1eafc \u0111\u1ecba ho\u1eb7c h\u1ec7 t\u1ecda \u0111\u1ed9 nh\u00e0 n\u01b0\u1edbc. V\u1edbi nh\u1eefng vi\u1ec7c \u0111\u00f3, ho\u1eb7c d\u00f9ng m\u00e1y qu\u00e9t t\u0129nh, ho\u1eb7c d\u00f9ng h\u1ec7 mobile k\u00e8m \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf v\u00e0 gi\u1eef l\u1ea1i c\u00e1c \u0111o\u1ea1n h\u00e0nh tr\u00ecnh.<\/p>\n\n\n\n<p>Thi\u1ebft b\u1ecb kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1. V\u1ea5n \u0111\u1ec1 l\u00e0 mua n\u00f3 d\u1ef1a tr\u00ean m\u1ed9t b\u1ea3ng th\u00f4ng s\u1ed1 kh\u00f4ng m\u00f4 t\u1ea3 d\u1ea1ng sai s\u1ed1 ch\u1ee7 \u0111\u1ea1o c\u1ee7a ch\u00ednh n\u00f3.<\/p>\n\n\n\n<div class=\"wp-block-group has-background\" style=\"background-color: #f5f5f5; border-left: 4px solid #C70100; padding: 32px;\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n\n\n<p style=\"font-size: 10px; font-style: normal; font-weight: bold; letter-spacing: 0.16em; text-transform: uppercase; color: #c70100; margin: 0 0 12px;\">Kh\u00e1c bi\u1ec7t c\u1ee7a VMTS<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"margin-top: 0;\"><span class=\"ez-toc-section\" id=\"Chung_toi_kiem_tra_point_cloud_truoc_khi_bao_gia_khong_phai_sau_khi_dung_mo_hinh\"><\/span>Ch\u00fang t\u00f4i ki\u1ec3m tra point cloud tr\u01b0\u1edbc khi b\u00e1o gi\u00e1, kh\u00f4ng ph\u1ea3i sau khi d\u1ef1ng m\u00f4 h\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>M\u1ecdi b\u1ed9 d\u1eef li\u1ec7u \u0111\u1ebfn v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec1u \u0111i qua b\u01b0\u1edbc ki\u1ec3m tra d\u1eef li\u1ec7u ngu\u1ed3n do c\u00e1c Geomatiker th\u1ef1c hi\u1ec7n, tr\u01b0\u1edbc khi b\u1ee9c t\u01b0\u1eddng \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c v\u1ebd. Ch\u00fang t\u00f4i c\u1eaft m\u1eb7t c\u1eaft qua c\u00e1c m\u1eb7t ph\u1eb3ng ngang v\u00e0 \u0111o ch\u00fang, truy c\u00e1c tr\u1ea1m qu\u00e9t l\u1ec7ch, ki\u1ec3m tra h\u1ec7 t\u1ecda \u0111\u1ed9 v\u00e0 cao \u0111\u1ed9 g\u1ed1c, r\u1ed3i b\u00e1o l\u1ea1i c\u00e1c thi\u1ebfu s\u00f3t b\u1eb1ng v\u0103n b\u1ea3n. N\u1ebfu m\u1ed9t point cloud kh\u00f4ng \u0111\u1ee7 s\u1ee9c g\u00e1nh m\u1ee9c \u0111\u1ed9 chi ti\u1ebft b\u1ea1n y\u00eau c\u1ea7u, b\u1ea1n bi\u1ebft \u0111i\u1ec1u \u0111\u00f3 ngay \u1edf giai \u0111o\u1ea1n b\u00e1o gi\u00e1, khi v\u1eabn c\u00f2n c\u00f3 th\u1ec3 quy\u1ebft \u0111\u1ecbnh qu\u00e9t l\u1ea1i, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00fac b\u00e0n giao khi l\u1ef1a ch\u1ecdn duy nh\u1ea5t c\u00f2n l\u1ea1i l\u00e0 ng\u1ed3i tranh lu\u1eadn.<\/p>\n\n\n\n<p>C\u0169ng v\u00ec v\u1eady, kh\u00e1ch h\u00e0ng c\u1ee7a ch\u00fang t\u00f4i lu\u00f4n g\u1eedi point cloud sang cho ch\u00fang t\u00f4i ki\u1ec3m tra tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng. Ki\u1ec3m tra, v\u00e0 khi c\u1ea7n th\u00ec c\u00e2n b\u1eb1ng l\u1ea1i point cloud, l\u00e0 m\u1ed9t b\u01b0\u1edbc c\u1ed1 \u0111\u1ecbnh tr\u01b0\u1edbc khi d\u1ef1 \u00e1n b\u1eaft \u0111\u1ea7u, kh\u00f4ng ph\u1ea3i tr\u01b0\u1eddng h\u1ee3p ngo\u1ea1i l\u1ec7. Th\u1ee9 \u0111i ti\u1ebfp v\u00e0o kh\u00e2u d\u1ef1ng m\u00f4 h\u00ecnh lu\u00f4n l\u00e0 m\u1ed9t point cloud \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra, hi\u1ec7u ch\u1ec9nh v\u00e0 ghi nh\u1eadn t\u00ecnh tr\u1ea1ng b\u1eb1ng v\u0103n b\u1ea3n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"margin-top: 20px;\"><span class=\"ez-toc-section\" id=\"Buoc_kiem_tra_du_lieu_nguon_cua_chung_toi_gom_nhung_gi\"><\/span>B\u01b0\u1edbc ki\u1ec3m tra d\u1eef li\u1ec7u ngu\u1ed3n c\u1ee7a ch\u00fang t\u00f4i g\u1ed3m nh\u1eefng g\u00ec<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Ki\u1ec3m tra v\u00e0 thi\u1ebft l\u1eadp l\u1ea1i \u0111\u1ed9 c\u00e2n b\u1eb1ng:<\/strong> c\u1eaft m\u1eb7t c\u1eaft qua s\u00e0n v\u00e0 tr\u1ea7n \u1edf nhi\u1ec1u v\u1ecb tr\u00ed, \u0111o v\u00e0 ghi nh\u1eadn sai l\u1ec7ch, kh\u1eafc ph\u1ee5c \u0111\u1ed9 nghi\u00eang tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u d\u1ef1ng m\u00f4 h\u00ecnh<\/li>\n<li><strong>T\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a registration:<\/strong> nh\u1eadn di\u1ec7n c\u00e1c b\u1ea3n qu\u00e9t l\u1ec7ch kh\u1ecfi b\u1ed9 d\u1eef li\u1ec7u, k\u00e8m khuy\u1ebfn ngh\u1ecb hi\u1ec7u ch\u1ec9nh ho\u1eb7c lo\u1ea1i b\u1ecf<\/li>\n<li><strong>H\u1ec7 t\u1ecda \u0111\u1ed9 v\u00e0 kho\u1ea3ng c\u00e1ch t\u1edbi g\u1ed1c:<\/strong> ki\u1ec3m tra h\u1ec7 quy chi\u1ebfu, d\u1eddi v\u1ec1 g\u1ea7n g\u1ed1c \u0111\u1ec3 d\u1ef1ng m\u00f4 h\u00ecnh v\u00e0 kh\u00f4i ph\u1ee5c v\u1ecb tr\u00ed tr\u1eafc \u0111\u1ecba khi xu\u1ea5t File<\/li>\n<li><strong>Cao \u0111\u1ed9 g\u1ed1c:<\/strong> x\u00e1c nh\u1eadn 0.00 n\u1eb1m \u0111\u00fang n\u01a1i d\u1ef1 \u00e1n mong \u0111\u1ee3i, tr\u01b0\u1edbc khi d\u1ef1ng h\u1ec7 t\u1ea7ng<\/li>\n<li><strong>\u0110\u1ed9 ph\u1ee7 v\u00e0 t\u00ednh \u0111\u1ea7y \u0111\u1ee7:<\/strong> danh s\u00e1ch b\u1eb1ng v\u0103n b\u1ea3n c\u00e1c khu v\u1ef1c kh\u00f4ng c\u00f3 d\u1eef li\u1ec7u, \u0111\u1ec3 m\u1ecdi gi\u1ea3 \u0111\u1ecbnh trong m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c ghi r\u00f5 l\u00e0 gi\u1ea3 \u0111\u1ecbnh<\/li>\n<li><strong>B\u00e1o c\u00e1o QC khi b\u00e0n giao:<\/strong> giao k\u00e8m File native v\u00e0 IFC2x3, li\u1ec7t k\u00ea m\u1ecdi h\u1ea1ng m\u1ee5c \u0111\u00e3 ki\u1ec3m tra v\u00e0 m\u1ecdi sai l\u1ec7ch \u0111\u00e3 ph\u00e1t hi\u1ec7n<\/li>\n<\/ol>\n\n\n\n<p style=\"margin: 0;\">\u0110\u00e2y l\u00e0 nguy\u00ean t\u1eafc c\u1ee7a ch\u00fang t\u00f4i trong th\u1ef1c t\u1ebf: &#8220;B\u1ea1n qu\u00e9t, ch\u00fang t\u00f4i h\u1ed7 tr\u1ee3 to\u00e0n b\u1ed9 c\u00e1c c\u00f4ng \u0111o\u1ea1n ph\u00eda sau, t\u1eeb point cloud \u0111\u1ebfn m\u00f4 h\u00ecnh BIM native.&#8221; B\u1ea1n ch\u1ecdn thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p v\u1edbi c\u00f4ng vi\u1ec7c kinh doanh c\u1ee7a m\u00ecnh. Ch\u00fang t\u00f4i n\u00f3i th\u1eb3ng d\u1eef li\u1ec7u c\u1ee7a n\u00f3 g\u00e1nh \u0111\u01b0\u1ee3c g\u00ec v\u00e0 kh\u00f4ng g\u00e1nh \u0111\u01b0\u1ee3c g\u00ec, r\u1ed3i giao m\u00f4 h\u00ecnh \u1edf m\u1ee9c \u0111\u1ed9 chi ti\u1ebft \u0111\u00e3 th\u1ed1ng nh\u1ea5t tr\u01b0\u1edbc khi d\u1ef1 \u00e1n b\u1eaft \u0111\u1ea7u.<\/p>\n\n\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"VMTS_doi_tac_point_cloud_to_BIM_cua_ban\"><\/span>VMTS, \u0111\u1ed1i t\u00e1c point cloud to BIM c\u1ee7a b\u1ea1n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>VMT Solutions chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u point cloud th\u00e0nh m\u00f4 h\u00ecnh BIM native t\u1eeb n\u0103m 2009, tr\u00ean Archicad, Revit, Allplan v\u00e0 Vectorworks, cho c\u00e1c c\u00f4ng ty tr\u1eafc \u0111\u1ecba, v\u0103n ph\u00f2ng ki\u1ebfn tr\u00fac v\u00e0 ch\u1ee7 \u0111\u1ea7u t\u01b0 t\u1ea1i khu v\u1ef1c DACH v\u00e0 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. Ch\u00fang t\u00f4i x\u1eed l\u00fd b\u1ea3y \u0111\u1ecbnh d\u1ea1ng point cloud g\u1ed3m E57, RCP, LAS, FLS, LAZ, XYZ v\u00e0 PTX, t\u1eeb m\u1ecdi nh\u00f3m thi\u1ebft b\u1ecb, v\u00e0 lu\u00f4n giao IFC2x3 c\u00f9ng b\u00e1o c\u00e1o QC b\u00ean c\u1ea1nh File native.<\/p>\n\n\n\n<div style=\"display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1px; background: #DADADA; border: 0.5px solid #DADADA; font-family: Arial,Helvetica,sans-serif; margin: 0 0 24px;\">\n<div style=\"background: #ffffff; padding: 24px 20px; text-align: center;\">\n<div style=\"font-size: 36px; font-weight: bold; color: #c70100; line-height: 1;\">3&ndash;5 cm<\/div>\n<div style=\"font-size: 11px; color: #9e9e9e; margin-top: 6px; text-transform: uppercase; letter-spacing: 0.08em; line-height: 1.4;\">\u0110\u1ed9 nghi\u00eang \u0111i\u1ec3n h\u00ecnh ch\u00fang t\u00f4i \u0111o \u1edf nh\u00f3m thi\u1ebft b\u1ecb n\u00e0y<\/div>\n<\/div>\n<div style=\"background: #ffffff; padding: 24px 20px; text-align: center; border-left: 0.5px solid #DADADA; border-right: 0.5px solid #DADADA;\">\n<div style=\"font-size: 36px; font-weight: bold; color: #000000; line-height: 1;\">&plusmn;15 mm<\/div>\n<div style=\"font-size: 11px; color: #9e9e9e; margin-top: 6px; text-transform: uppercase; letter-spacing: 0.08em; line-height: 1.4;\">\u0110\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc t\u1eeb LOD 300<\/div>\n<\/div>\n<div style=\"background: #ffffff; padding: 24px 20px; text-align: center;\">\n<div style=\"font-size: 36px; font-weight: bold; color: #000000; line-height: 1;\">2500+<\/div>\n<div style=\"font-size: 11px; color: #9e9e9e; margin-top: 6px; text-transform: uppercase; letter-spacing: 0.08em; line-height: 1.4;\">D\u1ef1 \u00e1n \u0111\u00e3 ho\u00e0n th\u00e0nh tr\u00ean to\u00e0n th\u1ebf gi\u1edbi<\/div>\n<\/div>\n<\/div>\n\n\n\n<p>\u0110\u1ecdc th\u00eam v\u1ec1 c\u00e1ch ch\u00fang t\u00f4i x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi c\u00f4ng vi\u1ec7c trong b\u00e0i <a href=\"https:\/\/vmts.ch\/en\/what-is-lod-200-300-400-in-bim\/\">LOD 100 \u0111\u1ebfn 400 trong BIM<\/a>, v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p kh\u1ea3o s\u00e1t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c trong b\u00e0i <a href=\"https:\/\/vmts.ch\/en\/is-matterport-data-accurate-enough-for-bim\/\">\u0111\u1ed9 ch\u00ednh x\u00e1c d\u1eef li\u1ec7u Matterport cho BIM<\/a>, ho\u1eb7c xem c\u00e1ch c\u00e1c <a href=\"https:\/\/vmts.ch\/en\/people-behind-bim-accuracy-vmt-solutions\/\">Geomatiker c\u1ee7a ch\u00fang t\u00f4i ki\u1ec3m tra point cloud<\/a> tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u d\u1ef1ng m\u00f4 h\u00ecnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap_ve_do_chinh_xac_may_quet_SLAM\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>M\u00e1y qu\u00e9t SLAM gi\u00e1 th\u1ea5p th\u1ef1c t\u1ebf ch\u00ednh x\u00e1c \u0111\u1ebfn \u0111\u00e2u?<\/summary>\n\n<p>Thi\u1ebft b\u1ecb ph\u00e2n kh\u00fac n\u00e0y th\u01b0\u1eddng c\u00f4ng b\u1ed1 1 \u0111\u1ebfn 3 cm. Trong c\u00e1c point cloud ch\u00fang t\u00f4i x\u1eed l\u00fd, sai l\u1ec7ch 3 \u0111\u1ebfn 5 cm ph\u1ed5 bi\u1ebfn h\u01a1n. Ki\u1ec3m nghi\u1ec7m \u0111\u1ed9c l\u1eadp \u1ee7ng h\u1ed9 b\u1eadc \u0111\u1ed9 l\u1edbn n\u00e0y: m\u1ed9t nghi\u00ean c\u1ee9u n\u0103m 2025 \u0111o \u0111\u01b0\u1ee3c RMSE 7,3 \u0111\u1ebfn 8,2 mm cho c\u00e1c h\u1ec7 SLAM th\u1ebf h\u1ec7 hi\u1ec7n t\u1ea1i v\u00e0 35,3 mm cho m\u1ed9t h\u1ec7 th\u1ebf h\u1ec7 c\u0169, so v\u1edbi 1,2 \u0111\u1ebfn 5,4 mm cho m\u00e1y qu\u00e9t t\u0129nh. \u0110i\u1ec1u quan tr\u1ecdng h\u01a1n l\u00e0 ph\u1ea7n l\u1edbn sai s\u1ed1 SLAM mang t\u00ednh h\u1ec7 th\u1ed1ng ch\u1ee9 kh\u00f4ng ng\u1eabu nhi\u00ean.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>V\u00ec sao point cloud c\u1ee7a t\u00f4i b\u1ecb nghi\u00eang, kh\u00f4ng n\u1eb1m ngang?<\/summary>\n\n<p>V\u00ec \u01b0\u1edbc l\u01b0\u1ee3ng ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00f4ng ho\u00e0n h\u1ea3o. Roll v\u00e0 pitch \u0111\u1ebfn t\u1eeb ph\u00e9p \u0111o tr\u1ecdng l\u1ef1c c\u1ee7a IMU, v\u00e0 m\u1ecdi sai s\u1ed1 trong \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u00f3 \u0111\u1ec1u b\u1ecb nh\u00e2n l\u00ean theo chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh. Sai s\u1ed1 t\u01b0 th\u1ebf 0,07\u00b0 t\u1ea1o ra kho\u1ea3ng 2,4 cm ch\u00eanh cao tr\u00ean 20 m, c\u00f2n 0,1\u00b0 cho 3,5 cm. Hi\u1ec7u \u1ee9ng c\u1ed9ng d\u1ed3n d\u1ecdc h\u00e0nh tr\u00ecnh, n\u00ean n\u1eb7ng nh\u1ea5t \u1edf h\u00e0nh lang d\u00e0i v\u00e0 l\u1edbn nh\u1ea5t \u1edf gi\u1eefa tuy\u1ebfn qu\u00e9t.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>D\u1ef1ng m\u00f4 h\u00ecnh tr\u00ean m\u1ed9t point cloud b\u1ecb nghi\u00eang th\u00ec sao?<\/summary>\n\n<p>M\u00f4 h\u00ecnh s\u1ebd ti\u1ebfp nh\u1eadn \u0111\u1ed9 nghi\u00eang \u0111\u00f3, c\u1ea5u ki\u1ec7n n\u00e0y qua c\u1ea5u ki\u1ec7n kh\u00e1c. Chi\u1ec1u cao t\u1ea7ng, cao \u0111\u1ed9 b\u1ec7 c\u1eeda v\u00e0 lanh t\u00f4, b\u1ec1 d\u00e0y s\u00e0n, \u0111\u1ed9 d\u1ed1c m\u00e1i v\u00e0 cao \u0111\u1ed9 \u0111i\u1ec3m \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb m\u1ed9t b\u1ec1 m\u1eb7t kh\u00f4ng n\u1eb1m \u0111\u00fang ch\u1ed7 n\u00f3 n\u1eb1m ngo\u00e0i c\u00f4ng tr\u00ecnh. M\u00f4 h\u00ecnh ho\u00e0n ch\u1ec9nh v\u1eabn tr\u00f4ng kh\u00f4ng ch\u00ea v\u00e0o \u0111\u00e2u \u0111\u01b0\u1ee3c, v\u00ec t\u1eaft point cloud \u0111i th\u00ec l\u1ed7i kh\u00f4ng c\u00f2n nh\u00ecn th\u1ea5y n\u1eefa. Nh\u01b0ng n\u00f3 v\u1eabn truy\u1ec1n \u0111i ti\u1ebfp, sang m\u1ecdi cao \u0111\u1ed9, m\u1ecdi m\u1eb7t c\u1eaft, m\u1ecdi b\u1ea3ng kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 m\u1ecdi c\u1ea5u ki\u1ec7n \u0111\u1eb7t s\u1ea3n xu\u1ea5t theo m\u00f4 h\u00ecnh. V\u00ec v\u1eady \u0111\u1ed9 nghi\u00eang ph\u1ea3i \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c tr\u01b0\u1edbc khi d\u1ef1ng m\u00f4 h\u00ecnh, kh\u00f4ng ph\u1ea3i sau.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Point cloud b\u1ecb nghi\u00eang c\u00f3 s\u1eeda \u0111\u01b0\u1ee3c sau khi qu\u00e9t kh\u00f4ng?<\/summary>\n\n<p>C\u00f3, nh\u01b0ng kh\u00f4ng t\u1ef1 \u0111\u1ed9ng. N\u1ebfu c\u00e1c tr\u1ea1m qu\u00e9t ri\u00eang l\u1ebb ho\u1eb7c c\u00e1c \u0111o\u1ea1n h\u00e0nh tr\u00ecnh v\u1eabn c\u00f2n th\u00ec vi\u1ec7c hi\u1ec7u ch\u1ec9nh kh\u00e1 tr\u1ef1c ti\u1ebfp: nghi\u00ean c\u1ee9u \u0111\u00e3 c\u00f4ng b\u1ed1 h\u1ea1 drift 10,6 cm xu\u1ed1ng 0,2 cm b\u1eb1ng ph\u00e9p bi\u1ebfn \u0111\u1ed5i phi c\u1ee9ng theo t\u1eebng \u0111o\u1ea1n, v\u00e0 \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf \u0111o b\u1eb1ng m\u00e1y to\u00e0n \u0111\u1ea1c cho k\u1ebft qu\u1ea3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. N\u1ebfu ch\u1ec9 c\u00f2n m\u1ed9t point cloud \u0111\u00e3 g\u1ed9p, kh\u00f4ng h\u00e0nh tr\u00ecnh, kh\u00f4ng \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf, th\u00ec kh\u00f4ng ph\u00e9p bi\u1ebfn \u0111\u1ed5i c\u1ee9ng n\u00e0o gi\u00fap \u0111\u01b0\u1ee3c, v\u00ec n\u00f3 ch\u1ec9 c\u00e2n b\u1eb1ng \u0111\u01b0\u1ee3c m\u1ed9t \u0111\u1ea7u b\u1eb1ng c\u00e1ch hy sinh \u0111\u1ea7u kia. Khi \u0111\u00f3 ph\u1ea3i hi\u1ec7u ch\u1ec9nh th\u1ee7 c\u00f4ng, b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, m\u1ed9t quy tr\u00ecnh \u0111\u1ecbnh s\u1eb5n v\u00e0 nh\u1eefng Geomatiker \u0111\u1ee7 kinh nghi\u1ec7m \u0111\u1ec3 ph\u00e1n \u0111o\u00e1n m\u1eb7t ph\u1eb3ng n\u00e0o trong c\u00f4ng tr\u00ecnh d\u00f9ng l\u00e0m chu\u1ea9n cao \u0111\u1ed9 \u0111\u01b0\u1ee3c. VMT Solutions th\u1ef1c hi\u1ec7n b\u01b0\u1edbc c\u00e2n b\u1eb1ng n\u00e0y nh\u01b0 m\u1ed9t kh\u00e2u c\u1ed1 \u0111\u1ecbnh tr\u01b0\u1edbc khi d\u1ef1ng m\u00f4 h\u00ecnh. D\u00f9 v\u1eady b\u1ea1n v\u1eabn n\u00ean gi\u1eef project g\u1ed1c b\u00ean c\u1ea1nh File xu\u1ea5t, v\u00ec n\u00f3 r\u00fat ng\u1eafn c\u00f4ng vi\u1ec7c \u0111i r\u1ea5t nhi\u1ec1u.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Point cloud t\u1eeb SLAM c\u00f3 \u0111\u1ee7 cho point cloud to BIM kh\u00f4ng?<\/summary>\n\n<p>C\u00f2n t\u00f9y m\u1ee9c \u0111\u1ed9 chi ti\u1ebft. V\u1edbi LOD 100 \u0111\u1ebfn LOD 200, b\u00f3c t\u00e1ch kh\u1ed1i l\u01b0\u1ee3ng, h\u1ed3 s\u01a1 ki\u1ec3m k\u00ea v\u00e0 ghi nh\u1eadn tr\u1ef1c quan, d\u1eef li\u1ec7u SLAM hi\u1ec7n nay th\u01b0\u1eddng l\u00e0 qu\u00e1 \u0111\u1ee7 v\u00e0 l\u1ee3i \u00edch n\u0103ng su\u1ea5t r\u1ea5t \u0111\u00e1ng k\u1ec3. V\u1edbi thi\u1ebft k\u1ebf chi ti\u1ebft LOD 300, ti\u1ec1n ch\u1ebf, \u0111\u00e1nh gi\u00e1 k\u1ebft c\u1ea5u ho\u1eb7c l\u00fan v\u00e0 h\u1ed3 s\u01a1 di s\u1ea3n, sai s\u1ed1 h\u1ec7 th\u1ed1ng 3 \u0111\u1ebfn 5 cm l\u1edbn h\u01a1n dung sai m\u00e0 c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi, khi \u0111\u00f3 c\u1ea7n m\u00e1y qu\u00e9t t\u0129nh ho\u1eb7c kh\u1ea3o s\u00e1t mobile c\u00f3 \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>\u0110\u1ed9 ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u0111\u1ed1i v\u00e0 tuy\u1ec7t \u0111\u1ed1i tr\u00ean datasheet kh\u00e1c nhau th\u1ebf n\u00e0o?<\/summary>\n\n<p>\u0110\u1ed9 ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u0111\u1ed1i m\u00f4 t\u1ea3 m\u1ee9c nh\u1ea5t qu\u00e1n n\u1ed9i b\u1ed9 trong point cloud tr\u00ean m\u1ed9t c\u1ef1 ly cho s\u1eb5n, v\u00ed d\u1ee5 1 cm trong 100 m, v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1ec9 b\u1eb1ng k\u1ef9 thu\u1eadt qu\u00e9t. \u0110\u1ed9 ch\u00ednh x\u00e1c tuy\u1ec7t \u0111\u1ed1i m\u00f4 t\u1ea3 m\u1ee9c kh\u1edbp c\u1ee7a point cloud v\u1edbi t\u1ecda \u0111\u1ed9 th\u1ef1c, th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi RTK ho\u1eb7c \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf m\u1eb7t \u0111\u1ea5t. Ph\u1ea7n l\u1edbn con s\u1ed1 qu\u1ea3ng b\u00e1 trong ph\u00e2n kh\u00fac n\u00e0y l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i. N\u1ebfu m\u00f4 h\u00ecnh c\u1ee7a b\u1ea1n ph\u1ea3i kh\u1edbp v\u1edbi kh\u1ea3o s\u00e1t tr\u1eafc \u0111\u1ecba, \u0111\u1ed9 ch\u00ednh x\u00e1c tuy\u1ec7t \u0111\u1ed1i m\u1edbi l\u00e0 con s\u1ed1 quy\u1ebft \u0111\u1ecbnh.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Gaussian splatting c\u00f3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c kh\u1ea3o s\u00e1t kh\u00f4ng?<\/summary>\n\n<p>Kh\u00f4ng. Gaussian splatting l\u00e0 k\u1ef9 thu\u1eadt t\u00e1i d\u1ef1ng v\u00e0 hi\u1ec3n th\u1ecb, cho ra k\u1ebft qu\u1ea3 th\u1ecb gi\u00e1c r\u1ea5t thuy\u1ebft ph\u1ee5c. N\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1edbi vi\u1ec7c b\u1ea3n qu\u00e9t tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng t\u1edbi vi\u1ec7c thi\u1ebft b\u1ecb bi\u1ebft v\u1ecb tr\u00ed c\u1ee7a ch\u00ednh n\u00f3 ch\u00ednh x\u00e1c \u0111\u1ebfn \u0111\u00e2u. M\u1ed9t b\u1ed9 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 tr\u00f4ng nh\u01b0 \u1ea3nh ch\u1ee5p m\u00e0 v\u1eabn mang v\u00e0i centimet drift h\u00e0nh tr\u00ecnh. Khi \u0111\u00e1nh gi\u00e1 thi\u1ebft b\u1ecb, h\u00e3y t\u00e1ch ph\u1ea7n h\u00ecnh h\u1ecdc ra kh\u1ecfi ph\u1ea7n visualize.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>L\u00e0m sao ki\u1ec3m tra m\u1ed9t m\u00e1y qu\u00e9t ngay t\u1ea1i tri\u1ec3n l\u00e3m?<\/summary>\n\n<p>Xin point cloud th\u00f4, ch\u01b0a georeference, c\u1ee7a m\u1ed9t h\u00e0nh lang d\u00e0i ho\u1eb7c m\u1ed9t m\u1eb7t s\u00e0n l\u1edbn, qu\u00e9t kh\u00f4ng c\u00f3 loop closure. C\u1eaft m\u1eb7t c\u1eaft \u0111\u1ee9ng qua t\u1ea5m s\u00e0n r\u1ed3i \u0111o cao \u0111\u1ed9 hai \u0111\u1ea7u. Sau \u0111\u00f3 qu\u00e9t l\u1ea1i c\u00f9ng kh\u00f4ng gian \u0111\u00f3 l\u1ea7n th\u1ee9 hai v\u00e0 so s\u00e1nh hai point cloud. C\u00f4ng tr\u00ecnh n\u00e0o d\u00e0i tr\u00ean kho\u1ea3ng 20 m c\u0169ng \u0111\u1ee7 l\u00e0m l\u1ed9 sai s\u1ed1 t\u01b0 th\u1ebf c\u1ee1 m\u1ed9t ph\u1ea7n m\u01b0\u1eddi \u0111\u1ed9, c\u00f2n t\u00ednh l\u1eb7p l\u1ea1i gi\u1eefa hai l\u01b0\u1ee3t qu\u00e9t l\u00e0 ch\u1ec9 b\u00e1o r\u1ebb nh\u1ea5t cho sai s\u1ed1 h\u1ec7 th\u1ed1ng.<\/p>\n<\/details>\n\n\n<div class=\"wp-block-group has-background\" style=\"background-color: #000000; padding: 48px;\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p style=\"font-size: 10px; font-style: normal; font-weight: bold; letter-spacing: 0.16em; text-transform: uppercase; color: #c70100;\">L\u00e0m vi\u1ec7c v\u1edbi VMTS<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"color: #ffffff; font-size: 24px; font-weight: 400; line-height: 1.3; border: none;\"><span class=\"ez-toc-section\" id=\"Dang_can_nhac_mot_may_quet_moi_Hay_gui_chung_toi_mot_bo_du_lieu_thu_truoc\"><\/span>\u0110ang c\u00e2n nh\u1eafc m\u1ed9t m\u00e1y qu\u00e9t m\u1edbi? H\u00e3y g\u1eedi ch\u00fang t\u00f4i m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u th\u1eed tr\u01b0\u1edbc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p style=\"color: #888888; font-size: 14px;\">Tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh mua, h\u00e3y g\u1eedi cho ch\u00fang t\u00f4i m\u1ed9t b\u1ea3n qu\u00e9t th\u00f4 t\u1eeb thi\u1ebft b\u1ecb \u0111\u00f3. Ch\u00fang t\u00f4i s\u1ebd ch\u1ea1y b\u01b0\u1edbc ki\u1ec3m tra d\u1eef li\u1ec7u ngu\u1ed3n, c\u1eaft m\u1eb7t c\u1eaft qua c\u00e1c m\u1eb7t ph\u1eb3ng ngang, \u0111o sai l\u1ec7ch v\u00e0 g\u1eedi l\u1ea1i k\u1ebft qu\u1ea3 b\u1eb1ng v\u0103n b\u1ea3n, th\u01b0\u1eddng trong v\u00f2ng 24 gi\u1edd v\u00e0 kh\u00f4ng r\u00e0ng bu\u1ed9c. Ch\u00fang t\u00f4i kh\u00f4ng b\u00e1n thi\u1ebft b\u1ecb, n\u00ean th\u1ee9 b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c l\u00e0 \u0111\u00e1nh gi\u00e1 v\u1ec1 d\u1eef li\u1ec7u, kh\u00f4ng ph\u1ea3i v\u1ec1 th\u01b0\u01a1ng hi\u1ec7u. \u0110i\u1ec1u n\u00e0y c\u0169ng \u0111\u00fang v\u1edbi c\u00e1c d\u1ef1 \u00e1n \u0111ang ch\u1ea1y: h\u00e3y g\u1eedi point cloud sang tr\u01b0\u1edbc khi d\u1ef1ng m\u00f4 h\u00ecnh. Ch\u00fang t\u00f4i r\u1ea5t s\u1eb5n l\u00f2ng trao \u0111\u1ed5i k\u1ebft qu\u1ea3 c\u00f9ng b\u1ea1n.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"fusion-button button-flat button-large button-custom fusion-button-default fusion-button-default-span fusion-button-default-type\" style=\"--button_accent_color: var(--awb-color1); --button_accent_hover_color: var(--awb-color1); --button_border_hover_color: var(--awb-color1); --button_gradient_top_color: var(--awb-custom_color_1); --button_gradient_bottom_color: var(--awb-custom_color_1); --button_gradient_top_color_hover: hsla(var(--awb-custom_color_1-h),var(--awb-custom_color_1-s),calc(var(--awb-custom_color_1-l) - 12%),var(--awb-custom_color_1-a)); --button_gradient_bottom_color_hover: hsla(var(--awb-custom_color_1-h),var(--awb-custom_color_1-s),calc(var(--awb-custom_color_1-l) - 12%),var(--awb-custom_color_1-a)); --button_text_transform: uppercase;\" href=\"https:\/\/vmts.ch\/en\/contact-us\/\" target=\"_self\" data-hover=\"icon_slide\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">G\u1eedi point cloud th\u1eed nghi\u1ec7m<\/span><i class=\"fa-long-arrow-alt-right fas awb-button__icon awb-button__icon--default button-icon-right\" aria-hidden=\"true\"><\/i><\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nguon_tham_khao\"><\/span>Ngu\u1ed3n tham kh\u1ea3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keitaanniemi, A., R&ouml;nnholm, P., Kukko, A., Vaaja, M. T. (2023): <em>Drift analysis and sectional post-processing of indoor simultaneous localization and mapping (SLAM)-based laser scanning data<\/em>. Automation in Construction. \u0110\u1ea1i h\u1ecdc Aalto.<\/li>\n<li>Braun, J. et al. (2025): <em>A Comparative Study of Indoor Accuracies Between SLAM and Static Scanners<\/em>. Applied Sciences 15(14), 8053. \u0110\u1ea1i h\u1ecdc K\u1ef9 thu\u1eadt Praha.<\/li>\n<li>Kubelka, V. et al. (2022): <em>Gravity-constrained point cloud registration<\/em>. arXiv:2203.13799.<\/li>\n<li>DIN 18202 <em>Toleranzen im Hochbau<\/em>, B\u1ea3ng 3 (dung sai \u0111\u1ed9 ph\u1eb3ng), d\u00f2ng 3, s\u00e0n ho\u00e0n thi\u1ec7n. Ti\u00eau chu\u1ea9n Th\u1ee5y S\u0129 t\u01b0\u01a1ng \u1ee9ng: SIA 414\/2:2016.<\/li>\n<li>T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn hi\u1ec7n tr\u01b0\u1eddng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u1ec1 drift SLAM, loop closure v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u0111\u1ed1i so v\u1edbi tuy\u1ec7t \u0111\u1ed1i (kh\u00f4ng n\u00eau t\u00ean thi\u1ebft b\u1ecb).<\/li>\n<\/ul>\n\n\n\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"TechArticle\",\"headline\":\"\u0110\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM: point cloud b\u1ecb nghi\u00eang\",\"description\":\"M\u00e1y qu\u00e9t SLAM gi\u00e1 th\u1ea5p c\u00f4ng b\u1ed1 1 \u0111\u1ebfn 3 cm. Th\u1ef1c t\u1ebf ch\u00fang t\u00f4i \u0111o 3 \u0111\u1ebfn 5 cm k\u00e8m m\u1ed9t sai s\u1ed1 nghi\u00eang c\u00f3 h\u1ec7 th\u1ed1ng. C\u1ea7n ki\u1ec3m tra g\u00ec tr\u01b0\u1edbc khi mua.\",\"inLanguage\":\"vi\",\"datePublished\":\"2026-08-20\",\"dateModified\":\"2026-08-20\",\"author\":{\"@type\":\"Organization\",\"name\":\"VMT Solutions Co., LTD\",\"url\":\"https:\/\/vmts.ch\/\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"VMT Solutions Co., LTD\",\"url\":\"https:\/\/vmts.ch\/\"},\"about\":[{\"@type\":\"Thing\",\"name\":\"\u0110\u1ed9 ch\u00ednh x\u00e1c m\u00e1y qu\u00e9t SLAM\"},{\"@type\":\"Thing\",\"name\":\"Point cloud to BIM\"},{\"@type\":\"Thing\",\"name\":\"Kh\u1ea3o s\u00e1t laser scanning\"},{\"@type\":\"Thing\",\"name\":\"Hi\u1ec7u ch\u1ec9nh point cloud\"}],\"citation\":[\"Keitaanniemi, A., Ronnholm, P., Kukko, A., Vaaja, M. T. (2023). Drift analysis and sectional post-processing of indoor SLAM-based laser scanning data. Automation in Construction.\",\"Braun, J. et al. (2025). A Comparative Study of Indoor Accuracies Between SLAM and Static Scanners. Applied Sciences 15(14), 8053.\",\"Kubelka, V. et al. (2022). Gravity-constrained point cloud registration. arXiv:2203.13799.\",\"DIN 18202 Toleranzen im Hochbau, Bang 3, dong 3.\"]}<\/script><\/p>\n\n\n\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"inLanguage\":\"vi\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"M\u00e1y qu\u00e9t SLAM gi\u00e1 th\u1ea5p th\u1ef1c t\u1ebf ch\u00ednh x\u00e1c \u0111\u1ebfn \u0111\u00e2u?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Thi\u1ebft b\u1ecb ph\u00e2n kh\u00fac n\u00e0y th\u01b0\u1eddng c\u00f4ng b\u1ed1 1 \u0111\u1ebfn 3 cm. Trong c\u00e1c point cloud ch\u00fang t\u00f4i x\u1eed l\u00fd, sai l\u1ec7ch 3 \u0111\u1ebfn 5 cm ph\u1ed5 bi\u1ebfn h\u01a1n. M\u1ed9t nghi\u00ean c\u1ee9u n\u0103m 2025 \u0111o \u0111\u01b0\u1ee3c RMSE 7,3 \u0111\u1ebfn 8,2 mm cho c\u00e1c h\u1ec7 SLAM th\u1ebf h\u1ec7 hi\u1ec7n t\u1ea1i v\u00e0 35,3 mm cho m\u1ed9t h\u1ec7 th\u1ebf h\u1ec7 c\u0169, so v\u1edbi 1,2 \u0111\u1ebfn 5,4 mm cho m\u00e1y qu\u00e9t t\u0129nh. \u0110i\u1ec1u quan tr\u1ecdng h\u01a1n l\u00e0 ph\u1ea7n l\u1edbn sai s\u1ed1 SLAM mang t\u00ednh h\u1ec7 th\u1ed1ng ch\u1ee9 kh\u00f4ng ng\u1eabu nhi\u00ean.\"}},{\"@type\":\"Question\",\"name\":\"V\u00ec sao point cloud c\u1ee7a t\u00f4i b\u1ecb nghi\u00eang, kh\u00f4ng n\u1eb1m ngang?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec \u01b0\u1edbc l\u01b0\u1ee3ng ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00f4ng ho\u00e0n h\u1ea3o. Roll v\u00e0 pitch \u0111\u1ebfn t\u1eeb ph\u00e9p \u0111o tr\u1ecdng l\u1ef1c c\u1ee7a IMU, v\u00e0 m\u1ecdi sai s\u1ed1 trong \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u00f3 \u0111\u1ec1u b\u1ecb nh\u00e2n l\u00ean theo chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh. Sai s\u1ed1 t\u01b0 th\u1ebf 0,07 \u0111\u1ed9 t\u1ea1o ra kho\u1ea3ng 2,4 cm ch\u00eanh cao tr\u00ean 20 m, c\u00f2n 0,1 \u0111\u1ed9 cho 3,5 cm. Hi\u1ec7u \u1ee9ng c\u1ed9ng d\u1ed3n d\u1ecdc h\u00e0nh tr\u00ecnh, n\u00ean n\u1eb7ng nh\u1ea5t \u1edf h\u00e0nh lang d\u00e0i v\u00e0 l\u1edbn nh\u1ea5t \u1edf gi\u1eefa tuy\u1ebfn qu\u00e9t.\"}},{\"@type\":\"Question\",\"name\":\"D\u1ef1ng m\u00f4 h\u00ecnh tr\u00ean m\u1ed9t point cloud b\u1ecb nghi\u00eang th\u00ec sao?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"M\u00f4 h\u00ecnh s\u1ebd ti\u1ebfp nh\u1eadn \u0111\u1ed9 nghi\u00eang \u0111\u00f3, c\u1ea5u ki\u1ec7n n\u00e0y qua c\u1ea5u ki\u1ec7n kh\u00e1c. Chi\u1ec1u cao t\u1ea7ng, cao \u0111\u1ed9 b\u1ec7 c\u1eeda v\u00e0 lanh t\u00f4, b\u1ec1 d\u00e0y s\u00e0n, \u0111\u1ed9 d\u1ed1c m\u00e1i v\u00e0 cao \u0111\u1ed9 \u0111i\u1ec3m \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb m\u1ed9t b\u1ec1 m\u1eb7t kh\u00f4ng n\u1eb1m \u0111\u00fang ch\u1ed7 n\u00f3 n\u1eb1m ngo\u00e0i c\u00f4ng tr\u00ecnh. M\u00f4 h\u00ecnh ho\u00e0n ch\u1ec9nh v\u1eabn tr\u00f4ng kh\u00f4ng ch\u00ea v\u00e0o \u0111\u00e2u \u0111\u01b0\u1ee3c, v\u00ec t\u1eaft point cloud \u0111i th\u00ec l\u1ed7i kh\u00f4ng c\u00f2n nh\u00ecn th\u1ea5y n\u1eefa. Nh\u01b0ng n\u00f3 v\u1eabn truy\u1ec1n \u0111i ti\u1ebfp, sang m\u1ecdi cao \u0111\u1ed9, m\u1ecdi m\u1eb7t c\u1eaft, m\u1ecdi b\u1ea3ng kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 m\u1ecdi c\u1ea5u ki\u1ec7n \u0111\u1eb7t s\u1ea3n xu\u1ea5t theo m\u00f4 h\u00ecnh.\"}},{\"@type\":\"Question\",\"name\":\"Point cloud b\u1ecb nghi\u00eang c\u00f3 s\u1eeda \u0111\u01b0\u1ee3c sau khi qu\u00e9t kh\u00f4ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00f3, nh\u01b0ng kh\u00f4ng t\u1ef1 \u0111\u1ed9ng. N\u1ebfu c\u00e1c tr\u1ea1m qu\u00e9t ri\u00eang l\u1ebb ho\u1eb7c c\u00e1c \u0111o\u1ea1n h\u00e0nh tr\u00ecnh v\u1eabn c\u00f2n th\u00ec vi\u1ec7c hi\u1ec7u ch\u1ec9nh kh\u00e1 tr\u1ef1c ti\u1ebfp: nghi\u00ean c\u1ee9u \u0111\u00e3 c\u00f4ng b\u1ed1 h\u1ea1 drift 10,6 cm xu\u1ed1ng 0,2 cm b\u1eb1ng ph\u00e9p bi\u1ebfn \u0111\u1ed5i phi c\u1ee9ng theo t\u1eebng \u0111o\u1ea1n. N\u1ebfu ch\u1ec9 c\u00f2n m\u1ed9t point cloud \u0111\u00e3 g\u1ed9p, kh\u00f4ng h\u00e0nh tr\u00ecnh v\u00e0 kh\u00f4ng \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf, th\u00ec kh\u00f4ng ph\u00e9p bi\u1ebfn \u0111\u1ed5i c\u1ee9ng n\u00e0o gi\u00fap \u0111\u01b0\u1ee3c, v\u00ec n\u00f3 ch\u1ec9 c\u00e2n b\u1eb1ng \u0111\u01b0\u1ee3c m\u1ed9t \u0111\u1ea7u b\u1eb1ng c\u00e1ch hy sinh \u0111\u1ea7u kia. Khi \u0111\u00f3 ph\u1ea3i hi\u1ec7u ch\u1ec9nh th\u1ee7 c\u00f4ng, b\u1eb1ng ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, m\u1ed9t quy tr\u00ecnh \u0111\u1ecbnh s\u1eb5n v\u00e0 nh\u1eefng Geomatiker \u0111\u1ee7 kinh nghi\u1ec7m. VMT Solutions th\u1ef1c hi\u1ec7n b\u01b0\u1edbc c\u00e2n b\u1eb1ng n\u00e0y nh\u01b0 m\u1ed9t kh\u00e2u c\u1ed1 \u0111\u1ecbnh tr\u01b0\u1edbc khi d\u1ef1ng m\u00f4 h\u00ecnh.\"}},{\"@type\":\"Question\",\"name\":\"Point cloud t\u1eeb SLAM c\u00f3 \u0111\u1ee7 cho point cloud to BIM kh\u00f4ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00f2n t\u00f9y m\u1ee9c \u0111\u1ed9 chi ti\u1ebft. V\u1edbi LOD 100 \u0111\u1ebfn LOD 200, b\u00f3c t\u00e1ch kh\u1ed1i l\u01b0\u1ee3ng, h\u1ed3 s\u01a1 ki\u1ec3m k\u00ea v\u00e0 ghi nh\u1eadn tr\u1ef1c quan, d\u1eef li\u1ec7u SLAM hi\u1ec7n nay th\u01b0\u1eddng l\u00e0 qu\u00e1 \u0111\u1ee7. V\u1edbi thi\u1ebft k\u1ebf chi ti\u1ebft LOD 300, ti\u1ec1n ch\u1ebf, \u0111\u00e1nh gi\u00e1 k\u1ebft c\u1ea5u ho\u1eb7c l\u00fan v\u00e0 h\u1ed3 s\u01a1 di s\u1ea3n, sai s\u1ed1 h\u1ec7 th\u1ed1ng 3 \u0111\u1ebfn 5 cm l\u1edbn h\u01a1n dung sai m\u00e0 c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi.\"}},{\"@type\":\"Question\",\"name\":\"\u0110\u1ed9 ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u0111\u1ed1i v\u00e0 tuy\u1ec7t \u0111\u1ed1i tr\u00ean datasheet kh\u00e1c nhau th\u1ebf n\u00e0o?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"\u0110\u1ed9 ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u0111\u1ed1i m\u00f4 t\u1ea3 m\u1ee9c nh\u1ea5t qu\u00e1n n\u1ed9i b\u1ed9 trong point cloud tr\u00ean m\u1ed9t c\u1ef1 ly cho s\u1eb5n, v\u00ed d\u1ee5 1 cm trong 100 m. \u0110\u1ed9 ch\u00ednh x\u00e1c tuy\u1ec7t \u0111\u1ed1i m\u00f4 t\u1ea3 m\u1ee9c kh\u1edbp c\u1ee7a point cloud v\u1edbi t\u1ecda \u0111\u1ed9 th\u1ef1c, th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi RTK ho\u1eb7c \u0111i\u1ec3m kh\u1ed1ng ch\u1ebf m\u1eb7t \u0111\u1ea5t. Ph\u1ea7n l\u1edbn con s\u1ed1 qu\u1ea3ng b\u00e1 trong ph\u00e2n kh\u00fac n\u00e0y l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i.\"}},{\"@type\":\"Question\",\"name\":\"Gaussian splatting c\u00f3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c kh\u1ea3o s\u00e1t kh\u00f4ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Kh\u00f4ng. Gaussian splatting l\u00e0 k\u1ef9 thu\u1eadt t\u00e1i d\u1ef1ng v\u00e0 hi\u1ec3n th\u1ecb, cho ra k\u1ebft qu\u1ea3 th\u1ecb gi\u00e1c r\u1ea5t thuy\u1ebft ph\u1ee5c. N\u00f3 \u1ea3nh h\u01b0\u1edfng t\u1edbi vi\u1ec7c b\u1ea3n qu\u00e9t tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng t\u1edbi vi\u1ec7c thi\u1ebft b\u1ecb bi\u1ebft v\u1ecb tr\u00ed c\u1ee7a ch\u00ednh n\u00f3 ch\u00ednh x\u00e1c \u0111\u1ebfn \u0111\u00e2u. M\u1ed9t b\u1ed9 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 tr\u00f4ng nh\u01b0 \u1ea3nh ch\u1ee5p m\u00e0 v\u1eabn mang v\u00e0i centimet drift h\u00e0nh tr\u00ecnh.\"}},{\"@type\":\"Question\",\"name\":\"L\u00e0m sao ki\u1ec3m tra m\u1ed9t m\u00e1y qu\u00e9t ngay t\u1ea1i tri\u1ec3n l\u00e3m?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Xin point cloud th\u00f4, ch\u01b0a georeference, c\u1ee7a m\u1ed9t h\u00e0nh lang d\u00e0i ho\u1eb7c m\u1ed9t m\u1eb7t s\u00e0n l\u1edbn, qu\u00e9t kh\u00f4ng c\u00f3 loop closure. C\u1eaft m\u1eb7t c\u1eaft \u0111\u1ee9ng qua t\u1ea5m s\u00e0n r\u1ed3i \u0111o cao \u0111\u1ed9 hai \u0111\u1ea7u. Sau \u0111\u00f3 qu\u00e9t l\u1ea1i c\u00f9ng kh\u00f4ng gian \u0111\u00f3 l\u1ea7n th\u1ee9 hai v\u00e0 so s\u00e1nh hai point cloud.\"}}]}<\/script><\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>T\u00f3m t\u1eaft: 3 \u00fd ch\u00ednh 01 Ch\u00eanh l\u1ec7ch gi\u1eefa 1 \u0111\u1ebfn 3 cm c\u00f4ng b\u1ed1 v\u00e0 3 \u0111\u1ebfn 5 cm ch\u00fang t\u00f4i th\u01b0\u1eddng \u0111o \u0111\u01b0\u1ee3c kh\u00f4ng ph\u1ea3i v\u1ea5n \u0111\u1ec1 ch\u00ednh. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7 [&#8230;]<\/p>\n","protected":false},"author":0,"featured_media":38649,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[414],"tags":[],"class_list":["post-38656","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-punktwolke-zu-bim-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts\/38656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/comments?post=38656"}],"version-history":[{"count":0,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts\/38656\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/media\/38649"}],"wp:attachment":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/media?parent=38656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/categories?post=38656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/tags?post=38656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}