I have a Raspberry Pi project that I’d love to use street maps for, but it would be a daunting challenge for me to figure out how to read map data and write the code to draw the maps on screen. It’s why I was delighted to discover Tangram ES , which is a library for rendering 2D and 3D maps using OpenGL ES 2 with data from OpenStreetMap. The library works on a number of devices, including of course Raspberry Pi

More here:
Tangram: An Open Source Map Rendering Library