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


Connecticut Imagery on CT ECO

CT ECO is a project of UConn CLEAR and CT DEEP and is full of maps and data.. A number of digital, statewide aerial imagery datasets have been captured for Connecticut and available on CT ECO. To view, visit the the aerial image viewer or connect to image services (bottom of the list). Download of several datasets also available.

features: interactive map, data download


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.

ConnecticutView is a statewide consortium of partners interested in cultivating opportunities for state and local applications of remote sensing technology through outreach, data distribution, education, training, and research activities in Connecticut.

features: download


Elevation (Lidar-based) on CT ECO

Connecticut is covered by a number of different Lidar datasets. One is a statewide dataset and the others were captured at different times by different vendors with different specs. Lidar is presented in services and in the Elevation Viewer as topography, hillshade, shaded relief, slope and aspect.

There is currently no way to download Lidar data from CT ECO. Most of the data is available for download at the NOAA Digital Coast.

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

features: interactive map, data download on CT ECO and the NOAA Digital Coast

Connecticut Lidar 10-foot DEM

This dataset is no longer supported by CLEAR. Contact us 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 topographic quadrangles or by town.

Connecticut Lidar-derived Products

This dataset is no longer supported by CLEAR. Contact us 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 presence. 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.

Changing Landscape


The project Includes land cover for 1985, 1990, 1995 and 2002, 2006, 2010 and 2015 for Connecticut. The website includes land cover and forest fragmentation in the forms of an interactive map, number and chart visualizations and download.

features: interactive map, data download


Long Island Sound Watershed

The project Includes land cover for 1985, 1990, 1995 and 2002, 2006, 2010 and 2015 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, impervious surface estimation and riparian area analysis in the forms of an interactive map, number and chart visualizations and download.

features: interactive map,download

Impervious Surfaces

2012 Impervious Surface for Connecticut

The 2012, statewide, 1 foot Impervious surface data was created as part of a grant from CT DEEP to UConn CLEAR in support of Connecticut's communities and their implementation of the MS4 permit. The impervious data is in the MS4 Viewer and is also available as a map service and for download on CT ECO.

features: interactive map, data download

Impervious Surface Analysis Tool (ISAT) Coefficients

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

Other Imagery and Data

Viewers on CT ECO including:

Aquaculture Mapping Atlas

CT MS4 Viewer

Long Island Sound Blue Plan Viewer

Sea Level Rise Effects on Roads and Marshes

CT DEEP Fish Community Data - Inland Waters

And more!

Coastal Aerial Imagery from 1934

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

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

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.

Connecticut Watershed 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

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