Quote Originally Posted by johnvanvliet View Post
like say the city of Rio (The Olympics ) but with different names ?

if you can post a image then we can see it, and guide you in the direction you need .

i am only guessing but something like i did in this post
https://www.cartographersguild.com/s...ad.php?t=34480
turn a image into a heightmap
Hi John,

I really liked your work in that post. I need to know how to make the field in my terrain and get the countour of the relief or line elevation.

terrain.png

This terrain has about 500.000 km2. The color green means which should be the hightest elevation at 1000 m.

What is the best way to do it?