While 16Mp seems to be a reasonable resolution for traditional images, basic pano resolution is usually (for instance, on 360cities.net) 6000x3000 for equirecta

While 16Mp seems to be a reasonable resolution for traditional images, basic pano resolution is usually (for instance, on 360cities.net) 6000x3000 for equirectangular images, that is 18Mp. Of course if you wish to allow zooming in even a little bit, that number is much, much larger. A modern DSLR with a pano head and a super wideangle/fisheye lens typically enables shooting somewhere in the range of (depending on actual lens setup) 60-300Mp panos with little effort - but of course we're talking about an altogether different gear. BTW, what's the purpose for a crowdsourced StreetView, when we have sites like 360cities.net?