Simple Map Viewer

Select to open the Simple Map ViewerThe Simple Map Viewer is for viewing one natural resource theme at a time such as farmland soils, wetland soils, protected open space, natural diversity data base areas, and water quality classifications. Select the map theme to display and optionally overlay it on 1990, 2004, 2006, 2008, 2009, or 2010 aerial photography. The simple map viewer includes links to CT ECO Data Guides and Resource Guides that explain each map theme. Map themes in the simple map viewer closely correspond with the maps available in the Map Catalog.

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Aerial Imagery Viewer

Select to open the Aerial Photo ViewerThe Aerial Imagery Viewer is designed for viewing digital aerial photography (imagery) available for Connecticut, certain regions in Connecticut, and along the Connecticut coastline and Connecticut River. It includes a collection of black and white, color, and infrared imagery published by various state and federal agencies. Refer to Connecticut Digital Orthophotography for descriptions of aerial photography available in CT ECO.

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CT 2016 Imagery Viewer

Select to open the Aerial Photo ViewerThe CT 2016 Viewer is designed for viewing the 2016, high resolution, 3 inch, 4 band digital aerial imagery for Connecticut. The viewer is designed to be used on all devices from mobile phones to large desktop screens. The viewer contains zoom, address search, locate me and share.

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Elevation (Lidar) Viewer

Select to open the Elevation ViewerThe Elevation Viewer inclues a statewide digital elevation model (DEM) that can be displayed as hillshade, shaded relief, slope or aspect.

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CT MS4 Viewer

The CT MS4 Viewer includes data layers that are helpful in registering for and complying with the 2017 CT MS4 General Permit.

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CT DEEP Fish Community Data - Inland Waters

Select to open the Fish ViewerConnecticut DEEP and UConn CLEAR have collaborated on a project to make Connecticut's freshwater fish community data (historical and current) available to the public. This new Fish Community Data Viewer allows users to search DEEP fish or macroinvertebrate community data for inland waters by town, waterbody or fish species. Fish and macroinvertebrate counts are available for over 2,270 sample sites across Connecticut. .

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The Advanced Map Viewer - Currently Offline

Update coming soon! Visit the beta viewer and beta help page.

Select to open Advanced Map ViewerThe Advanced Map Viewer is an interactive map viewer that allows you view more data and use GIS tools than available in the Thematic Map Viewers. The Advanced Map Viewer will display more than one map theme or data layer at once, allowing you to customize the map to display the information you want. You choose the map themes to display. For example, you can display Aquifer Protection Areas, Water Quality Classifications, or Drainage Basins with or without aerial photography in the background. You can pan and zoom the map, zoom to a street address or town, click on features on the map for database information, and print a map.

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Connecticut Coastal Hazards Viewer - Currently Offline

Coastal Hazards ViewerThe Connecticut Coastal Hazards Viewer is designed to allow users access to several pertinent suites of data for coastal Connecticut. Presented here are data representing sea level rise, high-resolution coastal elevation, hurricane storm surge, coastal erosion, and environmental observations such as tides, water quality, waves and currents.

Visit the Coastal Hazards Mapping Tool page at CT DEEP for more information

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Carbon Stock and Land Cover Viewer

The Carbon Stock and Land Cover Viewer displays the results of a research study. Visit the section on CT ECO to learn about the research and view the maps.

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Story Maps

Connecticut Bears

Connecticut's Changing Landscape

Connecticut's Coast: Then and Now


Refer to the Data Guides to learn about the data layers.

Refer to Connecticut Digital Orthophotography for descriptions of aerial photography available in CT ECO.