I'm a french developer and creator of 3D map models. I've developed a map model generation software that allows to create custom maps of moutains and cities with buildings and many other layers such as hydrography, roads, and vegetation areas, and custom GPX files. It uses a terrain generation algorithm that i've developed and can be used to get ultra-high definition of the terrain up to 1 meter resolution. I'm working on launching a website to allow anyone to create amazing 3D maps !