Danish CRS
Almost all public geospatial data is delivered in the CRS named ERTS89 / UTM zone 32. The ESPG code for this CRS is 25832. This is a 2D coordinate system but is also used in most Danish 3D, assuming a vertical datum such as DVR90. For 3D data it is therefor more correct to also specify the vertical datum using a compound CRS such as ESPG 7416, which is ERTS89 / UTM zone 32 + DVR90.
European CRS
| Coordinate reference system/ projection | Name and definition | Types of coordinates | When to be used – purpose |
|---|---|---|---|
| ETRS89 | European Terrestrial Reference System 1989 | Datum in decimal degrees | Any scale vector data representation. - All reference vector data should be stored as ETRS89 datum. - Not suitable for map display purposes. |
| ETRS-LAEA | Lambert Azimuthal Equal Area 5210 Latitude of origin: 52 N | Map projection in metres | Small scale mapping 1:500 000 or smaller applications including - spatial analysis - storing raster data - map display covering Europe |
| ETRS-LAEA | Lambert Azimuthal Equal Area 5265 Latitude of origin: 52 N Longitude of origin (central meridian): 65 E | Map projection in metres | Small scale mapping 1:500 000 or smaller applications including - map display covering Euasia |
| ETRS-LCC | Lambert Conformal Conical Latitude of origin (Parallels) at 35 N and 65 N Longitude of origin (central meridian): 10 E | Map projection in metres | Small scale mapping Only to be used for applications requiring an object to be rendered in its true shape |
| ETRS-TMzn (UTM) | Universal Transversal Mercator Different zones (zn) can be used | Map projection in metres | Large-scale mapping 1:10 000–1:499 999 |
For examples of differant projections, see https://github.com/Esbern/GIS_demo/blob/main/Projections.ipynb