Neighborhoods defined by the mayor's office for http://sffind.info/
Data Provided By: City and County of San Francisco Planning Department
Source Link: http://www.sfgov.org
License: Open Data Commons Public Domain Dedication and License
converted to topojson with http://www.mapshaper.org/
with help from http://bost.ocks.org/mike/map/
and http://bl.ocks.org/mbostock/5798874
osm tiles from http://openstreetmap.us/~migurski/vector-datasource/
responsive map from http://eyeseast.github.io/visible-data/2013/08/26/responsive-d3/
census data from http://uscensusbureau.github.io/citysdk