To view the GeoTiff in 3D the 'qgis2threejs' plugin from QGIS can be used. Projections Mercator (EPSG:3857): Used by OSM and GOOGLE in tiles World Geodetic System (EPSG:4326): Latitude / longitude projection Rijksdienst (RD, EPSG:28992): Coordinate system (based on meter) used in the...