I used the tutorial "doin stuff with Wlibur" to generate this map (and i'm very happy with it BTW):
Click image for larger version.  Name: Wilbur Texture.png  Views: 46  Size: 8.83 MB  ID: 132416
^ it's 30% of the original (12k x 12k) size, so it looks quit bad, but the big one looks nice.
v I used this image to generate it initialy, only the land was used of course (everything that is not some shade of blue):
Click image for larger version.  Name: Troa 12k.png  Views: 39  Size: 2.27 MB  ID: 132417
My plan was to generate the land and the ocean Height maps separetely, then in photoshop put the land in top o the ocean with a mask, this way i could play around with gradient maps more easily.
First i tried following the same tutorial i used for the land, but obviously, that's no good, then i started kicking around the paramters the tutorial showed, doing all kind of erosion shinanegans i know (not many realy, but still...) fill basins and alot of other stuff, but no, the results were too smoth or too rughed, never looking like a proper continental shelf.

Someone know a method to do this?

pls...