In a few weeks I might take a stab at creating a very simple format that would work for at least this tileset (and use this sketch to demo it)- I don't think it'll be hard at all, most of the work ought to be in creating the data files for each tileset.
I used imagemagick convert, I didn't write down the exact command line but the resulting tiles are here in subdirectories by type:
binarymillenium.googlecode.com/svn/trunk/processing/oga_tile
I started a thread about creating specification files that would do that sort of standardization:
http://opengameart.org/forumtopic/standard-metadata-for-tilesets-and-ani...
In a few weeks I might take a stab at creating a very simple format that would work for at least this tileset (and use this sketch to demo it)- I don't think it'll be hard at all, most of the work ought to be in creating the data files for each tileset.
I made a quick java/processing sketch here:
http://www.openprocessing.org/visuals/?visualID=16704
(source from https://binarymillenium.googlecode.com/svn/trunk/processing/oga_tile)
It doesn't use all the tiles yet so the randomly generated landscape isn't as rich as your example picture.
Thanks for the great art!