Procedurally generated terrain textures

This terrain texture is a procedurally generated image that simulates the look of a satellite/aerial photo. It is generated using some custom software I wrote, which processes digital elevation data to create the hill shading effect, along with additional datasets that give the aproximate density of trees over the entire area. Based on the tree density data, trees (conifer, hardwood and snags) are randomly distributed, complete with little shadows.

Here's a 1/16 scale version of the original. Click on it for a larger version.

[Blocked Image: http://www.fsl.orst.edu/lemma/gnnviz/images/test_composite_512.jpg]

Because it's all procedurally generated, I could in theory generate about any resolution I want with it, but i've found you don't gain much when you go over 8192 at least for this much land.

For comparison, here is the same area in Google Maps. More info on the project this is being used for at http://www.fsl.orst.edu/lemma/gnnviz/

Something I'm seriously thinking of doing is putting delta-height data in the Alpha channel for each tree, then use it for parallax mapping in a custom shader. Would really bring things alive.

The tree density data btw is generic "conifer" or "hardwood". I actually have much finer scale data (breakdown by species, by different sizes, etc.) but for this sort of high level view I don't need to get that detailed. You get more variation when you get down on the ground.