Here are relief maps for Switzerland and Denmark. They are low resolution maps that cover large areas. The maps are:
Switzerland.stl 120 x 200 points at 90 arc second intervals
Denmark.stl 240 x 180 points at 60 arc second intervals
The upper left corner of Switzerland.stl is at approximately 48 degrees north latitude and 6 degrees east longitude and the upper left corner of Denmark.stl is at 58 degrees north latitude and 8 degrees east longitude.
Data for the maps came from the Global Mapping project.
Data from Global Mapping is designed to be easily visualized. One way to do so is to use the many KML files available at the site. KML files open in Google Earth.
The maps are best printed directly on the build platform.
Elevation data obtained from Global Mapping comes as unformatted signed 16 bit bigendian integers. The fortran program used to create the openSCAD code that produced the map of Switzerland is included.