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terrain/README.md

@@ -1,16 +1,13 @@
 # Terrain profiling
 
-`terrain` aggregates and sources NASADEM tiles, and generates 1d
-elevation profiles between any two points on earth.
+`terrain` aggregates and sources NASADEM tiles, and generates 1d elevation profiles between any two points on earth.
 
-## Motivation
+## Motivating example
 
-Imaging we want to know what kind of terrain we'll encounter if we followed the line on this map from right to left:
+We want to know the terrain obstruction a ray will encounter if it followed the line on this map from east to west:
 
+[![lake-tahoe-google-maps](https://github.com/JayKickliter/geoprof/assets/2551201/d8e0bd0d-3fcc-4860-a152-29c90c3222f4)]("https://www.google.com/maps/d/u/0/embed?mid=1Q4TbMv-ZmAa4Uf6FizvkhQD3Ww2A498&ehbc=2E312F)
 
-<iframe src="https://www.google.com/maps/d/u/0/embed?mid=1Q4TbMv-ZmAa4Uf6FizvkhQD3Ww2A498&ehbc=2E312F" width="640" height="480"></iframe>
+We can use `terrain` to get data used to create this plot (`terrain` does not perform plotting itself):
 
-```rust
-use terrain::{Tiles, Profile};
-
-let tiles = 
+![lake-tahoe](https://github.com/JayKickliter/geoprof/assets/2551201/b8c94b4b-017c-4dd1-8a87-37c808ccea2b)