Tangram is a library for rendering 2D & 3D maps with WebGL, using GeoJSON/TopoJSON or binary vector tiles.
Instead of using traditional image tiles, we render from vector tiles that contain the underlying source geometry for each tile's bounding box.
Mapzen provides a free vector tile service that can be used with Tangram for OpenStreetMap base layer data, with worldwide coverage updated daily. There is also an OSM.US-hosted alternative.
Tangram currently supports GeoJSON/TopoJSON tiles as well as the mapnik binary format, both of which can be generated by the Mapzen vector tile service.
Here's an example GeoJSON tile.
The library also includes a Leaflet plugin, Tangram.LeafletLayer, to provide basic web map pan/zoom functionality.
npm install
make
The library will be minified in dist/, and index.html provides an example for rendering from different sources and simple Leaflet integration.