NYC DOITT - Services: GIS
http://www.nyc.gov/html/doitt/html/citywide/gis.shtml

New York City Department of Information Technology and Telecommunications


The mission of Citywide GIS is to develop, support and host an accurate digital map and geo-referenced data along with associated tools and applications that allow all City agencies to use the spatial data collected by many City entities. GIS information is provided to the public through the New York CityMap, which provides a wealth of information. Input of an address provides the user with a map. In addition to indicating the specific building requested, users can select additional icons to add to the map such as schools, day care centers, senior centers, libraries, hospitals and more as well as links to Web sites for these facilities. This page is also a single access point to many of the location-based applications on NYC.gov such as online property, building, census, statistics and safety information for New York City.

This resource is referenced here:
Subject: Environmental Science:Land Use and Planning
Resource Type: Datasets and Tools:Datasets with Tools