Natural Resource Information and Imagery
for Planning, Management, Education and Research

  • water
  • soils
  • aerials
  • geology
  • elevation
  • habitat
  • open space
  • contours
  • natural resources
  • watersheds
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Map Viewers

view and explore maps

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Map Catalog

printable static pdf maps by town

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Map Services

connect to data with GIS software

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information about map layers

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where to download GIS files

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FAQs, instructions and tips


Coordinates tool added to the SImple Viewer
2016 imagery is here! Town mosaics just added to the 2016 download page.
Simple Viewer - new and completely revamped
Map services have been updated


Lidar elevation services have moved from the old CT ECO to this new system. More information and service links here.
CT ECO has a new website! Let us know what you think (contact info in the footer)! Behind the new website is a whole new server system. We are excited for the upgrades and increased speed.
The quality (3 inch pixels!) and extent (statewide!) of 2016 flight is a first for Connecticut! All of the imagery tiles have been received and are available for viewing and downloading. Town mosaics and lidar files should be arriving soon - more updates here.
Revamped viewers include the Simple Map Viewer and Aerial Imagery Viewer. A new Advanced Viewer is in the works.

About this website

Connecticut Environmental Conditions Online (CT ECO) is the collaborative work of the Connecticut Department of Energy and Environmental Protection (DEEP) and the University of Connecticut Center for Land Use Education and Research (CLEAR) to share environmental and natural resource information with the general public. CT ECO's mission is to encourage, support, and promote informed land use and development decisions in Connecticut by providing local, state and federal agencies, and the general public with convenient access to the most up-to-date and complete natural resource information available statewide.

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. In addition, CT ECO includes several dates of high resolution orthophotography as well as statewide elevation data..



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