This is a simple synthetic map with a small pool in the north-west quadrant and a hill in the south-east. The map consists of a single cell that has only one level of detail; here is a view of the mesh from above:
and here is its colormap
and normal map
The map also has a water mask.
The map is available here as a gzipped tar file.
Posted revised map that has a flatter beach around the pool and also has the TQT orientation fix
Posted map with missing water mask added
Posted original map