I've downloaded two World Atlas apps, and one is fairly decent, but it lacks varied maps (topographical or political maps for ec example, as well as more close up detail). Some of the large atlases that can be found in public libraries are detailed, and finding even my small northern city in those atlases is easy. I'd pay for a good atlas on my iPhone, dunno, is there interest for a developer to put on out? Would people here buy an atlas like that? Perhaps an atlas with more content downloadable from a server (pay a bit for a package of ten, twenty downloadable detailed maps that can be zoomed into from the larger map?). Just an idea I'm wondering if there's interest for.