FAQ

• Useful CRS
• Where can I download DTMs?
• Can you recommend some good QGIS plugins?
• Useful software for the course
• Useful Python libraries for the course

Useful CRS

EPSG:7415 = 28992 + 5709 (NAP)

EPSG:4979 = WGS84 (EPSG:4326) + height in meters

Where can I download DTMs?

• This list is a good start
• and that one is also pretty good
• Copernicus DEM: global 90m and 30m, and 10m for EU area
• OpenTopography
• SRTM datasets are super cumbersome to download, better to use that very handy site
• AHN3 datasets are freely available on PDOK

Can you recommend some good QGIS plugins?

• If you work with raster files, use the Value Tool.
• the 3D-view of QGIS is rather buggy in our experience, for terrains better to use qgis2threejs

Useful software for the course

• QGIS: QGIS has a 3D viewer that could be useful
• GDAL utilities: to process rasters (included with QGIS)
• CloudCompare: to view/edit/process point clouds
• Blender and BlenderGIS: to view DTM and render them beautifully

Useful Python libraries for the course

• laspy: a Python package to read/write LAS/LAZ files
• pyproj: (to convert CRS)
• rasterio: GDAL bindings for Python
• startinpy: a Delaunay triangulator for the modelling of terrains (Python)