About the scenery:
The goal is to generate the entire United States in high resolution. All scenery is generated at or above zoom level 17. Areas in close proximity to major airports is generated in zoom level 18. All tiles are autogen and night lighting (3D) ready. The tiles are also optimized for best performance without compromising the quality.
Installation details and more information can be found at the dedicated NAPS web page.
Via Freddy de Pues from NAPS being informed that this service is for specific reasons no longer available. Sorry for the inconvenience!