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.
CT 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, 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, urban area orthophotography for 2008; and coastal orthophotography. 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 resource information. Contact the DEP Store to purchase printed copies of maps viewable from the CT ECO Map Catalog.
|The UConn Map and Geographic Information Center (UConn MAGIC) is part of the UConn library and contains a collection of historic maps, photography and digital spatial data. MAGIC makes much of this information and more available as GIS data downloads and services. Interactive map viewers also provide online access.|
The Connecticut State Data Center at the Connecticut Data Collaborative is the State’s lead organization in the U.S. Census Bureau’s State Data Center Program for Connecticut and is the state’s official source for census data.
|The UConn Center for Land Use Education and Research (CLEAR) creates and provides Connecticut land cover for 1985, 1990, 1995, 2002, 2006, 2010 and 2015. CLEAR also provides statewide lidar-based digital elevation data, map services, story maps and map viewers. Visit the CLEAR website for more information.||
|The 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.|
|The Office of Policy and Management (OPM) Conservation and Development Policies Plan can be downloaded as a pdf or in shapefile format.|
|Connecticut Department of Transport (ConnDOT) Maps - Download town road map (TRU) data in DGN, DXF and DWG formats and view state transportation and traffic maps in PDF format.|
|The Long Island Resource Center (LISRC) is jointly supported by CT DEEP and UConn and serves as a central clearinghouse for information and data related to Long Island Sound. It includes GIS data downloads and interactive mapping applications of bathymetry, sidescan sonar mosaics, geologic interpretations, surficial sediments, and more.||
Know of another good place to get CT GIS data? Send us an email.