my ios app has 10,000 users in one city, and they wii collect the trajectory in gpx format, i want to add way to openstreetmap use their gpx trajectory. there will be almost 100,000 gpx files one day, so it is not possible to edit map manual by software such as JOSN. I want to know if I can product ways accord to the 100,0000 gpx files automatic，I need a C++ library which can do this，can anyone help me please？please？ ----- my app users are in a small city of china, the current data in OSM about the city is not enough, it is nearly no roads in the small city, many roads are missing，so I must add the missing roads to the map. what I need is to make the whole road network first, then I can calculate the bicycle distance between any two different points of the city for my app。If the road network is not correct, it is not possible to get the distance. Because all I need is to get the distance of any two different points of the city, so the additional information is not necessary for me。 Is it possible that I can make my own map without the OSM data, I just begin from an empty map data,and I generate ways out of GPX files? ---- How can I generate a map only use my GPX files on my own server, it is no need to use current OSM data for me. Even that I still need to solve the three problems above。In Problem two, if some gpx files show that someone turn left of turn right on one cross track, is it meens that this is a road junction but not one of the ways is a bridge ?

my ios app has 10,000 users in one city, and they wii collect the trajectory in gpx format, i want to add way to openstreetmap use their gpx trajectory. there will be almost 100,000 gpx files one day, so it is not possible to edit map manual by software such as JOSN. I want to know if I can product ways accord to the 100,0000 gpx files automatic，I need a C++ library which can do this，can anyone help me please？