I've started working on a project with a huge number of polygons, and I'm unsure of how to display/host it. The map I'd like to end up with will have three layers:
1) Shaded polygons representing each of the 70K+ U.S. census tracts. I currently have this as both a shapefile and a spqllite file in Tilemill.
2) Another 15K points representing locations on roadways (this layer will be interactive)
3) A street layer, such as OpenStreetMap
I would set the opacity of the first layer so that the street layer remains visible. I've looked at possibly using UTFGrids, but haven't found much documentation.
Any ideas on how I might want to implement this one?
UPDATE: I'd prefer to use TileMill, but am open to different platforms.