Census Group we made this _from this_ issues data is _highly_ specific 'Plumbing Facilities by Occupants per Room by Year Structure Built'  but we found stuff  then we blew up   pro-tip: _DON'T READ THE COMMENTS_ main struggle currently just me no time limits to what more I can do without setting up a tile server current bottleneck is drawing the svg onto the map your phone will explode and now for something completely different I'm distracted because Mike Byrne from the FCC and I put out esri2open everything esri to geojson,sqlite,csv,json pure python no install no hassle no excuses open data needs to go on github all of it https://github.com/where-gov tell your friends