I'm using Tilestache to generate two layers with the mapnik and mapnik grid providers, and it's working great! However, I want users to be able to filter the data over many (more than ten) ...
I'm new to using Mapnik and TileStache. The reason i wanted to use these two pieces of software was to understand the UTFGrid specification i've seen used all over the place ( examples here, here, ...
Mapnik library has a Projection object (I'm using Python bindings): spherical_mercator = '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null ...