32. APPLICATION OF UAV DATA IN CITYGML DEVELOPMENT
Aero photogrammetric images acquired with the unmanned aerial system senseFly eBee were used for point cloud creation of the inhabited part of the Silba Island. The automatic point cloud classification that relies on machine learning was processed in the Pix4D program. DSM, orthomosaic and CityGML were created from the classified point cloud. Apart from classified point cloud as a basis for buildings heights, topographic map created from high-resolution orthomosaic of the area was used as a basis for buildings boundaries. CityGML was created using 3dfier software for detail level 1 (LoD1), encompassing all external surfaces of objects. A unique identification, along with house number, floor area, height and volume attributes were assigned to the buildings. The realistic preview of the recorded area in 3D was achieved inside Pix4D Cloud platform. Information and analytical preview of objects was achieved by loading and stylizing CityGML inside QGIS 3.0. Information preview holds buildings outline with house numbers, while stylizing buildings according to the attributes of height, floor area, accomplished the analytical preview and volume attributes. The information preview of the objects provides insight into the basic attributes of buildings and along with the realistic and the analytical preview creates a base for complete modern 3D buildings inventory.
Listing Details
- AuthorFilip Kovačić et al.
- AffiliationGEO OMEGA d.o.o.
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