tangram-es

The most accessible general-purpose map app for end users (Android and iOS) is written in C/C++. This is pretty high on the cool and useful scale: https://organicmaps.app/ Both map renderers Tangram-ES and Maplibre-GL - https://github.com/tangrams/tangram-es and - https://github.com/maplibre/maplibre-gl-native are also written in C/C++. Finally, most routing software, such as OSRM or Valhalla are written in C/C++.

> There are ofcourse glitches If you notice something not covered by existing https://github.com/streetcomplete/StreetComplete/issues - feel free to report it. Some glitches in map rendering are https://github.com/tangrams/tangram-es/ bugs, but in the worst case issue will be transferred/closed.

Specific map rendering projects from mapzen: Web Renderer: https://github.com/tangrams/tangram Native/Mobile Renderer: https://github.com/tangrams/tangram-es Native renderer can be accessed for android through gradle, ios through cocoapods and even available on raspberry pi. Scene file documentation: https://github.com/tangrams/tangram-docs https://mapzen.com/documentation/tangram/ (still seems to work :D) Scene file authoring tool: https://github.com/tangrams/tangram-play Which continues to live at http://tangram.city/play/ One of the great features of tangram is to embed any glsl shader in the scene file, which gets injected during rendering and "transforms" the map rendering and the map experience to a all new level, giving the some great flexibility cartographer/designer/developer will like. As an example check this demo "tron" scene:

this version seems to have arbitrary camera angle https://github.com/tangrams/tangram-es