Advanced Map Viewer_v2

The Advanced Map Viewer_v2 is an interactive map viewer that provides the ability to view and combine many different data layers at once. It includes basic tools for viewing layers, address search, sharing, and more. 

The original Advanced Map Viewer (version 1) is retired and is no longer updated. If the new viewer is missing functionality that you rely on, please let us know at clear@uconn.edu. 

Elevation (Lidar) Viewer_v2

The Elevation Viewer_v2 includes statewide bare earth elevation from 2023 and from 2016 that can be displayed as hillshade, shaded relief, slope, or aspect. The viewer also contains reference layers such as municipal boundaries, parcels, aerial imagery, and more. 

The original Elevation Viewer (version 1) is retired an is no longer updated. Please transition to the Elevation Viewer_v2.

Community Renewable Energy Siting Tool (CREST)

In May 2025, the Connecticut Department of Energy & Environmental Protection (DEEP) launched CREST to further Connecticut’s clean energy goals by enabling a more transparent and efficient siting and permitting process for large-scale renewable energy projects, while at the same time protecting Connecticut’s environmental and natural resources. It provides access to demographic, forestry, geology, land use, water, wildlife, electric utility interconnection, and other map layers. CREST can be used for informational purposes by municipal planners, solar developers, conservation organizations, members of the public, and others, but not as an agency determination or regulatory decision on solar suitability.

Long Island Sound Blue Plan Viewer_v2

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.

The original Long Island Sound Blue Plan Viewer (version 1) is being retired and is no longer updated. Please transition to using the Long Island Sound Blue Plan Viewer_v2. 

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.

CT Parcel Viewer_v2 (2023)

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 2023.

The CT Parcel Viewer (version 1) is  retired and is no longer updated. Please transition to using the CT Parcel Viewer_v2. 

CT DEEP Fish Community Data - Inland Waters

CT DEEP and UConn CLEAR have collaborated to make Connecticut's freshwater fish community data (historical and current) available to the public. The Fish Community Data Application allows users to search DEEP fish community data for inland waters by town, waterbody, subregional basin, county, or fish species.

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.

Sea Level Rise Effects on Roads and Marshes Viewer_v2

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. 

The Original Sea Level Rise Effects on Roads and Marshes Viewer (version 1) is retired. Please transition to using the Sea Level Rise Effects on Roads and Marshes Viewerv2

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.