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Simple Map Viewer

The  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 aerial photography or elevation. The simple map viewer includes links to CT ECO Data 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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Advanced Map Viewer

The Advanced Map Viewer is an interactive map viewer that provides more tools than the Simple Map Viewer as well as the possibility to combine many different data layers.

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Aerial Imagery Viewer

The 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 CT Digital Aerial Datasets for descriptions of aerial photography available in CT ECO.

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UConn MAGIC Air Photo Archive

The UConn MAGIC Air Photo Archive viewer is designed for finding historical aerial photographs that have been scanned. It is created and maintained by the University of Connecticut Map and Geographic Information Center (MAGIC), part of the UConn Libraries. 

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CT 2016 Imagery Viewer

The 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

The Elevation Viewer includes a statewide digital elevation model (DEM) that can be displayed as hillshade, shaded relief, slope or aspect.

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3D Lidar Viewer

The 3D Lidar Viewer is a proof of concept for publishing statewide colorized Lidar points in a 3D ArcGIS Online web scene. It was created with the help of Esri's Living Atlas Team. It includes Lidar points colored using imagery, elevation, intensity as well as points for buildings, bridges and more.

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Long Island Sound Blue Plan Viewer

The purpose of the Long Island Sound Blue Plan is to identify and protect places of traditional use and ecological significance, and to minimize conflicts, now and in the future. This includes preserving a collective vision of Long Island Sound, and facilitating a transparent, science-based decision-making process. The Blue Plan Map Viewer contains data layers for the plan in a format for exploration.

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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 Parcel Viewer (2020)

Parcels, or defined pieces of land, delineate how land is divided. In Connecticut, parcels are maintained at the local (municipal) level. This CT Parcel Viewer is an aggregation of all of the municipal parcel datasets collected by the Councils of Governments in 2020.

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Sea Level Rise Effects on Roads and Marshes

To better understand how Connecticut’s coastal area marshes and roads may respond to sea level rise (SLR), Sea Level Affecting Marshes Model (SLAMM) was applied to Connecticut’s shoreline by Warren Pinnacle Consulting, Inc. This viewer displays the model’s results for Connecticut’s 21 largest marshes and all coastal area roads. For marshes, SLAMM was run two hundred times using alternative model inputs for key model parameters, including various SLR scenarios, to produce probability based results of likely future marsh conditions. For roads, the model uses a single SLR scenario of about 4.2 feet by 2100 from the base year of 2002.

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CT DEEP Fish Community Data - Inland Waters

CT DEEP and UConn CLEAR have collaborated on a project to make Connecticut's freshwater fish community data (historical and current) available to the public. The 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 thousands of sample sites across Connecticut.

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CT Aquaculture Mapping Atlas

The CT Aquaculture Mapping Atlas was developed by the University of Connecticut's Center for Land use Education and Research for the Connecticut Sea Grant Program, in collaboration with the Connecticut Department of Agriculture, Bureau of Aquaculture. It is intended to be a resource for industry managers and aquaculture enthusiasts. The Atlas includes up-to-date coastal and marine data layers including state and municipal shellfish beds, shellfish area markers, shellfish sampling stations, aquaculture gear areas, recreational and natural shellfish beds, areas licensed for seaweed production, shellfish classification areas, eelgrass beds, and more. Please note the Atlas is an outreach tool intended to be used for educational purposes only.

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CT Coastal Hazards Viewer

The 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.

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CT's Changing  Landscape Land Cover Viewer

The Connecticut Land Cover Viewer contains all dates of land cover as well as Change To, Change From, and Forest Fragmentation layers. It also has many layers where towns are colored based on a single land cover. Learn more about the layers in the Land Cover Viewer.

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Lower Long Island Sound Watershed Land Cover Viewer

The Long Island Sound Watershed Land Cover Viewer contains all dates of land cover as well as Change To, Change From, Riparian Area Land Cover, and Impervious Surface Estimate layers. It also has many layers where HUC 12 watersheds are colored based on a single land cover. Learn more about the layers in the Land Cover Viewer.

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NOAA High Resolution Land Cover For Connecticut

Connecticut now has 1 meter resolution land cover courtesy of the NOAA Office of Coastal Management Coastal Change Analysis Program (C-CAP). The resolution means that each pixel covers a 1 meter square on the ground. Previous land covers are 30 meter squares - a big difference.