In the folder example_data (download example dataset) there is a small part of the BGT datasets (2D 1:1k topographic datasets of the Netherlands), and a part of the AHN3 LIDAR dataset that can be used for testing.
#Res2dinv tutorial archive#
To be able to quickly test 3dfier one can download the example dataset and unzip the archive in the folder of 3dfier.
In order to make easy use of 3dfier we created pre-build binaries which can be downloaded from the releases page.ĭownload the latest release and unzip the archive in a easy to find location, not in the download folder of your browser. If the vegetation is not classified or not filtered out, then buildings might be taller and there might be artefacts in the terrain. 0-1: Created, never classified and/or unclassified.We expect the LAS/LAZ to be classified according to the ASPRS Standard LIDAR Point Classes v1.4 (Table 4.9 of this PDF), and at a minimum these should be defined: Journal of Open Source Software, 6(57), = , 3dfier: automatic reconstruction of 3D city models. Ledoux H, Biljecki F, Dukai B, Kumar K, Peters R, Stoter J, and Commandeur T (2021). If you use 3dfier in a scientific context, please cite this article: The 3dfier documentation has extensive information on the installation, usage, and how 3dfier works. If you use it, feedback is very much appreciated. The ID of each polygon is preserved, and there is a 1-to-1 mapping between the input and the output. their ID and height (ground+roof) are output in a tabular format), PostGIS, and STL. Output is in the following formats: OBJ, CityGML, CityJSON, CSV (for buildings only, i.e. It is possible to define new classes, although that would require a bit of programming. The lifting options can be configured in the YAML file provided, an example is provided in /resources/config_files/myconfig.yml.Īny 2D input (which should be a planar partition) can be used as input, and each class must be mapped to one of the following:
This video illustrates the process and what 3dfier is about.
#Res2dinv tutorial software#
This surface will then be used as input in simulation software for instance.
no intersecting triangles, no holes (the surface is watertight), where buildings are integrated in the surface, etc. Our aim is to obtain one DSM that is error-free, i.e. That is, water polygons are extruded to horizontal polygons, buildings to LOD1 blocks, roads as smooth surfaces, etc.Įvery polygon is triangulated (constrained Delaunay triangulation) and the lifted polygons are "stitched" together so that one digital surface model (DSM) is constructed. The elevation is obtained from a point cloud (we support LAS/LAZ at this moment), and the semantics of every polygon is used to perform the lifting. topographical datasets) and "3dfies" them (as in "making them three-dimensional") by lifting every polygon to 3D.