I doubt its designed for non urban areas. Which seems sensible as multipath interference is not a huge problem (save for a few places) Trying to get decent GPS

I doubt its designed for non urban areas. Which seems sensible as multipath interference is not a huge problem (save for a few places) Trying to get decent GPS fixes in urban canyons is pretty hard. Hence why uber have been doing multipath mapping (https://eng.uber.com/rethinking-gps/ https://eng.uber.com/rethinking-gps/) The other thing to note is that the "VPS" (ugh, stupid name) would work indoors as well, something GPS/Glonass/Galileo can't do. Using visual keypoints has much bigger advantages, unless you're using a 360 camera (and most people really arn't they are terrible) you not only get potentially a much more accurate location, but you get a heading too. something GPS only gives you with two or more samples. Depending on what or how the "VPS" works, those same keypoints could be passed to the client so that local tracking can be more accurate. So, is it a GPS replacement? no, does it provide something GPS can't do? yes, very much yes.