Unit 15 - Reprojection

In order to perform simple flooding simulation we need digital elevation model (DEM) for our area of interest (AOI). There are several options like global DEM datasets (SRTM, EU-DEM, …), local DEMs created as a product of laser scanning techniques.

In our example we will use EU-DEM global dataset provided by Copernicus programme. Let’s download tile covering our region, be aware data are quite big (4GB), see note below. There is no need to import into GRASS the whole big DEM tile. By using -r flag of r.in.gdal we can import just a subregion covering our AOI.