Hi all,

I have created a topographic map from scratch using a number of layers of colours in a gradient. I am looking to convert this to a height map to then create a DEM. I have converted the layers to grayscale (0-255) but now I need to blend those layers to create a smooth height map for conversion. Any ideas how?

I initially drew the map in Illustrator but also have photoshop available.

Cheers!
Sam