Application of LIDAR data for creating three-dimensional models of the site/Erdviniu skenavimo duomenu taikymas vietoves trimaciams modeliams generuoti

The article examines the technological peculiarities of creating 3D models of a site applying LIDAR data. Two data sources, including the method of scanning the Earth's surface data using LIDAR and orthophoto maps have been applied. The non-regularities of the point cloud and the accuracy of LIDAR data were investigated. The reasons affecting the quality of LIDAR data were detected and methods for improving scanning technology were suggested. An algorithm detecting and eliminating essential errors was proposed. Experimental research included data on an orthophoto map sheet of Lithuanian territory at a 1:10000 scale. Keywords: LIDAR, orthophoto map, laser scanning, 3D model. Refs 7. Figs 7. Analizuojami vietoves trimaciu modeliu sudarymo remiantis erdviniais skenavimo duomenimis technologijos ypatumai. Taikomi du duomenu saltiniai--LIDAR metodu sukaupti Zemes pavirsiaus lazerinio skena-vimo duomenys ir ortofotografiniai zemelapiai. Istirtas LIDAR duomenu tikslumas ir gaunamu tasku aibes netolygumas. Nustatytos priezastys, turincios itakos LIDAR duomenu kokybei, bei pasiulyta skenavimo technologijos tobulinimo budai. Pateiktas algoritmas grubioms klaidoms LIDAR duomenyse rasti ir salinti. Eksperimentiniam tyrimui taikyta vieno Lietuvos teritorijos 1:10 000 mastelio ortofotografinio zemelapio lapo apimties duomenys. LIDAR duomenys gauti ir ortofotografiniai zemelapiai pagaminti 2009 metais. Reiksminiai zodziai: LIDAR, ortofotografiniai zemelapiai, lazerinis skenavimas, trimatis vietoves modelis.