Webgl picking polygons on map with readPixels using an offscreen buffer.
Open index.html and mouse over a district to see its name.
Code and ideas taken heavily from:
- Stanislav Sumbera’s Polygon libtess fill in WebGL
- Brendan Kenny's Google Maps + HTML5 + Spatial Data Visualization
- Pedro Sousa's Displaying WebGL data on Google Maps.
TODO
Clean up code and add comments