I've been hiking in the mountains around the Taipei/Keelung area for years and have lots of photos of distant peaks from other peaks. I'd like to build a 3D surface mesh of the topography so I can play with it in Python and maybe Blender to make sense of it (personal use).

Are there publicly available topographical data for northern Taiwan that I could use to do this?

Ideally in some tabular format so that I wouldn't have to install stand-alone software in order to use. A python package is no problem. I don't mind massaging or interpolating from one coordinate system to another myself, as long as it's not too complicated.

I'm looking for resolution of something of the order of 5 meters vertically an 10 horizontally, but there's no specific hard requirement.

  • @PolyGeo this wasn't as difficult as I'd imagined!
    – uhoh
    Feb 3 '19 at 5:44

update: There is an extensive list of open sources of topographical data of Earth provided in this thorough answer.

This will do the trick for me, although my application is non-critical.

  1. go to US Global Data Explorer https://gdex.cr.usgs.gov/gdex/
  2. create a login ID and sign in
  3. select NASA SRTM 1 arcsec on the right side (works for much of the Earth covered by the Space Shuttle's orbit, but not the poles, and has inaccuracies and holes)
  4. select ROI with one of the options in the toolbar (click User Guide)
  5. download in GeoTIFF or ASCII format
  6. click metadata for info scale and other information, see the first six lines in the ASCII file as well.
  7. this height data is referenced to the WGS84 ellipsoid.
  8. have fun!

enter image description here

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.