Add feature to display vector maps overlain on raster maps.
Multiple raster maps with a transparency setting for the top layer would also be useful.
for me, this is currently impossible. Main limitation is memory limit on every android process. So maybe later when device will be more powerful (CPU is fast enough, but common 24MB limit on application is really low on this)
Maybe it's just a matter of merging two or more images and then displaying the final image. Then you would only need the additional memory temporary for each tile.
that is correct (this is done for example on multi layers maps) ... this will anyway need additional power ... anyway good point. I'll think about it