We are already working with the TIGER/Line Shapefiles. Now we want to be able to produce maps. Trying out Polymaps made us realize that it makes calls to Cloudmade to get the mapping tiles.
Is this something that can be changed? Can we use PostGIS or TileMill instead of making calls to CloudMade?
If so, can you give some guidance as to how we can go about it. Any help will be appreciated.