GIS Data Sources

New York Data Sources

NYS GIS Clearinghouse

  • Operated by the New York State Office of Cyber Security & Critical Infrastructure Coordination
  • Data sets include digital orthoimagery (primary source), vector GIS data from public and private sources, digital raster quadrangles

Cornell University Geospatial Information Repository

  • Online repository in the National Spatial Data Clearinghouse program
  • Data sets include vector GIS data from public sources, digital raster quadrangles

Peconic Estuary Program GIS Clearinghouse

GIS data for the Peconic watershed is available by request.

Connecticut Data Sources

Connecticut Department of Energy and Environmental Protection

Data sets include digital orthoimagery, USGS topos, vector GIS data from public and private sources, geology, hydrology, soils, and more.

MAGIC – Map and Geographic Information Center

  • Operated by the University of Connecticut Library
  • Data sets include raster and vector data sets, including historical maps
  • Additional demographic data from

CLEAR – Center for Land Use Education and Research

  • Operated by the University of Connecticut, College of Agriculture and Natural Resources
  • Data sets include land cover in image and shapefile formats for several years

Regional GIS Users Groups


Long Island GIS Users Group:

NYS GIS Association:

Northeast Arc Users Group:

Connecticut GIS User to User Network:

Geospatial Information Systems (GIS) Council:

Federal Data Sources

Geospatial One-Stop

This portal contains thousands of metadata records (information about the data) and links to live maps, features, and catalog services, downloadable data sets, images, clearinghouses, map files, and more.

NOAA Nautical Charts

Coastal chart data in raster and vector format.

NOAA Land Cover Analysis

  • This website provides land cover mapping data, tools, and assistance to the coastal management community. The NOAA Coastal Services Center works with resource managers and mapping professionals to promote the use of land cover mapping to address coastal management issues.

NOAA Land Cover Change Data

  • The NOAA Coastal Services Center created land cover and change data for the Northeast region according to Coastal Change Analysis Program (C-CAP) standards. Land cover and land cover change data were produced for 1996-2001. These data were produced using 30-meter resolution Landsat Thematic Mapper and Landsat Enhanced Thematic Mapper satellite imagery.

US Census Bureau

  • Demographics as maps and tables

USDA Natural Resources Conservation Service

  • Soil information available through interactive maps and downloadable data

US Environmental Protection Agency – Envirofacts

  • The Envirofacts Data Warehouse includes data and mapping applications for the US

US Environmental Protection Agency – Region 2

  • Data for New York including EPA Regulated Facilities and Monitoring Data

US Fish and Wildlife Service – National Wetlands Inventory

  • View and download wetlands maps

US Geological Survey – Earth Resources Observation and Science (EROS)

  • Data Sets include Aerial photos, Satellite photos, Elevation data, Land Use data

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