I was looking for a way to 3d print a 3d topographical map, and found an older post on matterhackers. Unfortunately, those instructions didn’t work, and were quite complicated even if they did work.
Here’s a much easier solution:
Get the SRTM elevation data directly from the SRTM Data site.
Download a zip file, for example this one of the SF Bay area (and most of California).
Inside there is a TIFF file. Use your favorite bitmap editor to crop to the area you like, and save as a bitmap file.
Then, simply open in cura and create gocde directly! It’s just too simple.