OASIS NYC stands for Open and Accessible Space Information System for New York City. With OASIS it’s easy to zoom to a property (or community garden, stewardship “turf”, or waterfront site) as it is to develop a richly-layered map of land use patterns, aerial views, and open space resources in each borough and citywide.
OASIS NYC Map Makes Loads of Geographic Data Available to the Public
Great source for community maps of NYC - free and all in one place.