While going through my twitter feed I came across a project that allowed users to upload SVG files, extrude them into 3D models using Three.js, and charged $5 for downloading the resulting GLTF file.

This workflow is designed to create 3D printable models from GeoTIF Files provided by the Bayernatlas (https://atlas.bayern.de/), which is bavaria, a region of Germany. It might work with other data ...