Credits: Wikipedia So far we’ve used our Digital Elevation Model (DEM) to create hillshade and color relief. Contours is another common cartographic method used to show the shape of the terrain. If contour lines are placed close to each other, it means that the terrain is steep. Let’s add some contours for our terrain map of Jotunheimen. We can use a GDAL command, gdal_contour, to create vector contour lines from a DEM: gdal_contour -a height jotunheimen.tif jotunheimen_contour_25m.shp -i…