Constructed using 1 arcsecond resolution SRTM data from the Space Shuttle (about 1.9 million polygons). This software was created using a new and, as yet, unreleased version of SRTM2STL. The source code for creating files at 3 arcsecond resolution is available up on github under the GNU license. Go to github and hunt for SRTM2STL.
You may want to print this to be relatively small. I get warping using PLA and it becomes bad when I attempt to publish Raised Relief Maps that are large. I have had 'some' success with large maps. If you have a way to control warping you may also have better luck with large maps.