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Geographic Information Systems

Geographic Information Systems at DEEP plays an important role in the DEEP's mission of protecting and preserving the environment for present and future generations. DEEP develops and maintains a statewide automated geographic storage and retrieval system that can rapidly integrate and analyze large amounts of spatial map and file data over any selected geographic area. DEEP develops and shares geospatial information with federal, state, and municipal government agencies such as the U.S. Geological Survey, Environmental Protection Agency, Federal Emergency Management Agency, Connecticut Department of Public Health, Connecticut Department of Transportation, and the Connecticut Office of Policy and Management.

Visit our GIS Data Download Page
Our GIS Data page provides a wealth of GIS data available for download in NAD83 coordinate system via an ftp site.  This allows for faster downloads for larger files such as orthophotos and topographic data.  Check out GIS Data for DEEP's environmental resource downloads. Please note that as of October 1st, 2020 the GIS Data Download Page will be completely replaced by the GIS Open Data Website, and will no longer be accessible.  


Visit our GIS Open Data Website
Our new GIS Open Data Website uses ArcGIS Hub functionality to showcase a dedicated website for spatial data viewing and download.This separate website will take the place of our above GIS Data Download Page on October 1, but for now, both will be available. Please note that the data sets from both resources will be kept up to date simultaneously. Check out our GIS Open Data Website for a more interactive experience!

CT ECO Website
The Connecticut Department of Energy & Environmental Protection (DEEP) and the University of Connecticut Center for Land Use Education and Research (CLEAR) have launched a new website, Connecticut Environmental Conditions Online (CT ECO) that includes the latest and most accessible online maps and tools for viewing Connecticut’s environmental and natural resource information.

CT ECO includes a variety of online maps and tools for viewing Connecticut’s environmental and natural resources such as protected open space, farmland soils, wetland soils, aquifer protection areas, water quality classifications, and drainage basins.  Each can be viewed separately or in conjunction with other environmental and natural resource information.

Other Data Download or GIS Related Links
For further information regarding Geographic Information Systems in the Department of Energy & Environmental Protection, please contact: GIS Section
Department of Energy & Environmental Protection
Office of Information Management
79 Elm Street
Hartford, CT 06106-5127
Telephone: (860) 424-3540 DEEP.GISDATA@ct.gov Content Last Updated on August 13, 2020