9. USGS imagery
Nobody seems to care about the USGS data viewer, which offers aerial images with 1m resolution. And even more, they can be freely distributed by giving credits to them. We could offer a similar map for aerofly as shown in the x-plane forum, at least for the USA!!!
We all know the USGS imagery is far superior in most cases to FSET but the manual building of all those INF files is so tedious and time consuming that large areas are almost unworkable. We could some a bit of automation in the calculations.