Spatial (or geospatial) data is suitable for use in GIS mapping software (like ArcGIS or Google Earth) and can come in a variety of formats: vector, raster, or data tables. For more, see the earlier tab on using spatial data in this guide.
NY City Map (from DoITT): Map a neighborhood or intersection, then find nearby subway stops, schools, hospitals, police precincts, and more (user guide here). Also shows municipal boundaries like community districts & census tracts. Other city data maps include:
Find spatial data using Columbia University Libraries' GeoData Portal (beta)!