Where to Download Data

GIS data for Connecticut is available from several Connecticut websites. These websites offer a variety of options for obtaining spatial data you can use with your geographic information system (GIS) software, including file downloads and map services. Additionally, many of these websites also include interactive map viewers, scanned maps, digital maps in PDF format, and aerial photos you can view online.

The 2012 Ortho Imagery is available for download from CT ECO.

Connecticut GIS Data Download Websites

Department of Energy and Environmental Protection DEEP GIS Data Downloads - Download in Shapefile or Geodatabase format the natural resource and environmental data used in CT ECO such as Aquifer Protection Areas, DEEP Property, Drainage Basins, Elevation Contours, Federal Open Space, 1997 Municipal and Private Open Space, Lake Bathymetry, Natural Diversity Data Base Areas, Protected Open Space Mapping, Parcels for Protected Open Space Mapping, and Water Quality Classifications. Also available are mosaics of statewide orthophotography for 1990, 2004, 2006, and 2008; urban area orthophotography for 2008; and coastal orthophotography for 2004 and 2005. CT ECO Map Services also make this information available without the need to download GIS data files.

DEEP Store - Purchase topographic maps, geologic quadrangle maps, nautical charts, and statewide maps and reports of natural reource information. Contact the DEP Store to purchase printed copies of maps viewable from the CT ECO Map Catalog.

Center for Land Use Education & Research CLEAR - Download Connecticut land cover for 1985, 1990, 1995 & 2002 and Connecticut LiDAR-based Digital Elevation Data in a variety of GIS data formats. Connect your GIS software to imagery map services of 2004 statewide orthophotography and coastal orthophotography for 2004 and 2005. Access statewide natural resource and land use information using interactive map viewers such as the Community Resource Inventory (CRI), Connecticut Land Cover, and Impervious Surfaces of Long Island Sound information sections fo the CLEAR website.

University of Connecticut Map and Geographic Information Center UConn MAGIC - The UConn Map and Geographic Information Center (MAGIC) is part of the UConn library and maintains a collection of current and historic maps, photography and digital spatial data including topographic quadrangle maps, aerial photo indexes, 1934, 1991, 2004, 2006, 2008 photography, 1954, 1961 land use and land cover maps, and 2008 TIGER Boundary files. MAGIC makes much of this information and more available as GIS data downloads and map services for GIS users. Interactive map viewers also provide online access.

Connecticut State Library Connecticut State Library - Maintains 1934, 1951-2, 1965, 1970, 1977, 1980, 1985-6, 1990, and 1995 statewide aerial photograph collections and additional smaller collections. All are “secured collections” that are retrieved by library staff and which must be used in the Library. The 1934, 1938, 1965, 1991, and 2004 aerial photos are also available online.

Office of Policy and Management OPM Conservation and Development Policies Plan - Download the Locational Guide Map data in Shapefile format or view the Locational Guide Map PDF documents online.

Department of Transportation ConnDOT Maps - Download town road map (TRU) data in DGN, DXF and DWG formats and view state transporation and traffic maps in PDF format.

Long Island Sounce Resource Center Long Island Resource Center (LISRC) - Jointly supported by DEEP and UConn, the LISRC serves as a central clearinghouse for information and data related to Long Island Sound. Includes GIS data downloads and interactive mapping applications of bathymetry, sidescan sonar mosaics, geologic interpretations, surficial sediments, and more.