Actually the code used to map is more like a checkerboard than anything else, but the mapping to a sphere makes it look round. I'm not really sure where this whole hi-rez thing is coming from the map will never be more the 400x200 pixels, all the mapsat does is continuously average the areas that have been mapped previously. As of right now the size is fixed but innsewerants has told me he wants to add zoomable maps.