Asset Overview
using terrain2stl by jhatch, doubled the height to accentuate detail
Terrain2STL creates STL files using the SRTM3 dataset from 2000, which has a resolution of about 90 meters on the equator.
open with meshlab to "unify duplicate vertices" then open with meshmixer, extrude to a big block, then solidify, then cut the bottom flat and thin.