These featured topics have received special treatment and are each mini-websites inside CT ECO.
Aerial Imagery
A One Stop Shop
Elevation & Lidar
A One Stop Shop
Impervious Surface
Impervious surfaces are those where water doesn't infiltrate into the ground. They include roads, buildings, driveways, sidewalks, and more. Learn about the different impervious surface layers available for Connecticut and how to access them.
CT Parcels
Connecticut parcels are an aggregation of municipal parcel datasets collected by the Councils of Governments and the CT GIS Office. Learn about the different layers and how to access them.
2023 Imagery & Lidar
Orthoimagery (3 inch pixel resolution) and Lidar elevation data for all of Connecticut collected in the spring of 2023. This is the first Quality Level 1 statewide Lidar acquisition for Connecticut.
2019 Aerial Imagery
Orthoimagery (6 inch pixel resolution) for Connecticut collected in the spring of 2019.
2017 Eastern CT Coast Aerial Imagery
The imagery was collected for the photo interpretation and delineation of submerged aquatic vegetation (mainly Zostera marina, or eelgrass) in Long Island Sound. These data are a continuation of other USFWS efforts to map eelgrass in previous years.
2016 Imagery & Lidar
Orthoimagery (3 inch pixel resolution) and Lidar elevation data for all of Connecticut collected in the spring of 2016. The flight is Connecticut's first statewide acquisition this high level of detail
3D Lidar Point Viewer (2016)
An interactive, 3D viewer of statewide colorized Lidar points.
2012 Aerial Imagery
Orthoimagery (6 inch pixel resolution) for all of Connecticut collected in the spring of 2012.
1934 Historic Aerial Photography
Information about and different ways to view the 1934 aerial photo mosaic created by UConn MAGIC. CLEAR is also working on an image service of 1934 tiles with high quality georeferencing.
Land Cover
Land Cover on CT ECO includes three datasets - the newer Changing Landscape with NLCD (National Landcover Database), the original Changing Landscape project and several High Resolution Land Cover datasets. Learn about, explore, connect to, or download land cover for Connecticut.
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 all data layers for the project in a format for exploration.
Sea Level Rise Effects on Roads & 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. This viewer displays the model’s results for Connecticut’s 21 largest marshes and all coastal area roads.
Aquaculture Mapping Atlas
The Aquaculture Mapping Atlas is a resource for industry managers and aquaculture enthusiasts.
DEEP Fish Community Data - Inland Waters
CT DEEP's freshwater fish and macro-invertebrate community data (historic and current). Available to view and download.
CT MS4 Supporting Layers
water quality and impervious surface
Layers supporting Connecticut's MS4 Stormwater permit including 2012, 1 foot, statewide impervious surface are available for viewing and download.