Script to generate CONUS raster of various OSM metrics connected to TIGER extent. Counties2012 table is in spherical Albers projection: `+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 +y_0=0 +a=6378137 +b=6378137 +nadgrids=@null +units=m +no