http://tags.library.upenn.edu/tag/GIS+housing PennTags Feed for /tag/GIS+housing PennTags Feed http://tags.library.upenn.edu/makerecord/url/6118 http://tags.library.upenn.edu/makerecord/url/6118 New York City Housing and Neighborhood Information System Like the NIS in Philadelphia, this site provides lots of information about New York at various levels of geographic specificity.<br />