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CLEAR Imagery & Data

Imagery | Elevation | Land Cover| Impervious Surface | Other Imagery and Data | Tools


On CT ECO - Maps and data for Connecticut

Go to CT ECO

CT ECO has 14 imagery datasets and growing. View them in aerial imagery viewer, connect to map services or read the data guides.

features: interactive maps, data download

Connecticut 2012 Imagery

Go to 2012 Imagery

Statewide aerial imagery was captured in March of 2012. Visit the 2012 Orthophotography page on CT ECO to view, connect to and download the imagery.

features: interactive maps, data download


Website coming soon. Connecticut statewide mosaics of the best available Landsat (MSS, TM, ETM+, OLI) “leaf-off” and “leaf-on” satellite imagery from the 1970’s, 1980’s, 1990’s, 2000’s, and present.

features: download (coming)


Elevation (Lidar-based) on CT ECO

Go to CT ECO

Connecticut is covered by a number of different LiDAR datasets. They were captured at different times by different vendors with different specs. We have creasted a seamless map services of the elevation data that shows topography, hillshade, slope and aspect.

There is currently no way to download LiDAR data from CT ECO. If the data is available for download elsewhere, it is noted on this page.

The Elevation Viewer is a great way to explore the diffrent layers and includes an address search, swipe tool and more. Visit the viewer help and tips.

features: interactive maps, data download (sort of)

Connecticut LiDAR 10-foot DEM

This dataset is no longer supported by CLEAR. Contact us (info at the bottom of the page) with any questions.

This DEM dataset represents 10-foot spatial resolution elevation information as derived through the spatial interpolation of airborne LiDAR collected in the year 2000 for Connecticut. The elevation data are in a gridded (TIFF) format and are projected into the State Plane Coordinate System Zone 0600, orthometric heights (NAVD 88) in US Survey feet. Data can be downloaded as USGS topgraphic quadrangles or by town.

Connecticut LiDAR-derived Products

This dataset is no longer supported by CLEAR. Contact us (info at the bottom of the page) with any questions.

This statewide dataset consists of LiDAR-derived data products generated from Connecticut's 2000 statewide LiDAR coverage including tiled point clouds, TINs, DEMs, and contour shape files. The raw data consist of last-return LiDAR postings covering approximately 4,845 sq. miles of Connecticut. These data were created and made accessible through funding provided by the Connecticut Joint Highway Research Council, project JH07-02, whose support is gratefully acknowledged.

Connecticut Land Cover

CLEAR has created a robust set of satellite-derived land cover for Connecticut over the years. Different pieces have been funded by different parties, resulting in a confusing web presense. All the base land cover is the same. The variations are due to how they are served and displayed (basin, town, etc). We are working on this and hope to improve things after the 2015 land cover in completed, sometime in 2016.

Long Island Sound Watershed's Changing Landscape


Includes 1985, 1990, 1995, 2002, 2006, 2010 land cover for Connecticut and portions of New York in the Long Island Sound Watershed (northern Long Island and parts of New York City and Westchester County. The website includes land cover and change maps, riparian area maps, impervious cover by basin maps, statistics by basin, map services and data download.

features: interactive maps (a lot), data download

Connecticut's Changing Landscape

Go to CCL

Includes land cover for 1985, 1990, 1995 and 2002, 2006 land cover for Connecticut. The website includes statewide statistics and graphics, town and watershed maps and stats, and more. Use the Long Island Sound Watershed site for download, in order to get all dates.

The Connecticut's Changing Landscape site also includes websites dedicated to forest fragmentation, riparian corridors and ag lands over ag soils.

features: story map, data download

Impervious Surfaces

Impervious Surface Analysis Tool (ISAT) Coefficients

Go to ISAT

The Impervious Surface Analysis Tool (ISAT) is a GIS extension that estimates impervious surface area using land cover and coefficients. Each land cover dataset requires a specific set of coefficients. Coefficients were developed for use with the 2002 land cover data for Connecticut.

features: coefficients for use in tool

Impervious Surfaces for Long Island Sound

Go to IS LIS

Impervious surface image data for Long Island Sound (includes a portion of New York City and northern Long Island) for 1985, 1990, 1995 and 2002 including change.


Other Imagery and Data

The Aquaculture Mapping Atlas

Go to Aquaculture Map

A free, interactive web tool developed by CLEAR and the Connecticut Sea Grant program to provide open access to the states’ coastal resource information, particularly data that applies to aquaculture and marine spatial planning.

Note: The Atlas require the Adobe Flash Player plug-in to run in a web browser.

features: interactive map

Coastal Aerial Imagery from 1934

Go to Imagery

Aerial photos captured in 1934 were carefully georeferenced so they can be compared with current imagery. As you might guess, there have been alot of changes along Connecticut's shoreline.

features: interactive map, story map (coming soon)

Unmanned Aircraft System (UAS) Imagery and Surface Model for Great Gull Island, NY

Go to Great Gull

In 2013, as part of a restoration project, Connecticut Sea Grant and the University of Connecticut Extension partnered with Helen Hays to create a vegetation management plan designed to improve nesting habitat. Helen is the Director of the Great Gull Island (GGI) Project.

The project included creating a high resolution map as well as a high resolution surface dataset using an unmanned, electric quadcopter and Pix4D software.

features: interactive map (coming soon)

Connecticut Watershed Maps

Get Maps

Way back in the early days of NEMO, a map for each of Connecticut's 169 towns was created showing the watersheds that make up each town. Although the maps are not cutting edge and not even new, they are still quite useful. Get yours here.

features: pdf maps for download

The Dynamics of Global Urban Expansion

Get Data

Conducted as part of a team that included New York University and Williams College, CLEAR researchers looked at urban extent and expansion over a ten-year period for 120 cities with a population over 100,000, worldwide. This study is providing insight into the relationships of population growth and urban expansion in developing countries.

features: data download

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