Reversing Hill Shading in Digital Elevation Models
A while back on the Geographic Information Systems Subreddit I stumbled upon this question. A user wished to get height information from this elevation map they had found somewhere: Unforunately it has hill-shading applied on top of the color bar. While this shading technique makes it easier to understand the terrain structure at a glance, it also makes it harder to extract the raw height data from the map. So first we’ll have to understand how hill-shading works in order to find a way to get around it....