CT ECO Basic Data Guide

2010 Coastal Color Orthophotography

Example of 2010 Coastal Orthophotography


Coastal Connecticut 2010 Color Orthophotography is an aerial survey of 2010, leaf on, color imagery for the region encompassed by Connecticut municipalities located along the Long Island Sound coastline and along the main stem of the Connecticut River up to the Massachusetts State line. The ground resolution for this imagery is 1 foot (0.305 meter) per image pixel.


Orthophotography combines the image characteristics of a photograph with the geometric qualities of a map. It depicts land use, natural resources, vegetation, and other features and characteristics in the immediate shoreline areas of Connecticut during the summer of 2010. This orthophotography includes 4 color bands, allowing for the display and analysis in natural color or color infrared. The nearby example is in natural color. This leaf-on, natural color imagery serves a variety of purposes from observing vegetation and crop condition to supporting identification and mapping of habitat areas through photo interpretation.

Use Limitations

This is leaf on orthophotography so the tree canopy blocks the ground surface from view and creates shadows that can obscure nearby features. Also, the location and shape of features in other GIS data may not exactly match information shown in the 2010 aerial photography primarily due to differences in spatial accuracy and data collection dates. For example, a stream in the 1:24,000-scale Connecticut Hydrography data from CT DEP may not line up exactly with the watercourse shown in the 2010 aerial photography. Their location and shape are bound to be different because information such as hydrography compiled from older 1:24,000-scale USGS topographic quadrangle maps, lacks the spatial accuracy and is less current than the 2010 orthophotography.

Dataset Information

Coverage area of 2010 Coastal Color Orthophotography
  • Status - Orthophotography covers portions of the following municipalities: Branford, Bridgeport, Chester, Clinton, Cromwell, Darien, Deep River, Derby, East Haddam, East Hartford, East Hampton, East Haven, East Lyme, East Windsor, Enfield, Essex, Fairfield, Glastonbury, Greenwich, Guilford, Groton, Haddam, Hamden, Hartford, Ledyard, Lyme, Madison, Middletown, Milford, Montville, New Haven, New London, Norwalk, Norwich, North Branford, North Haven, Old Lyme, Old Saybrook, Orange, Portland, Preston, Rocky Hill, Shelton, South Windsor, Stamford, Stonington, Stratford, Suffield, West Haven, Waterford, Westbrook, Wethersfield, Westport, Windsor, and Windsor Locks. Includes all offshore islands within the territorial borders of the State of Connecticut including Goose Island and Falkner Island (offshore of Branford); Calf Islands and Great Captain Island (offshore of Greenwich); Norwalk Islands (offshore of Norwalk); Thimble Islands (offshore of Branford); Sandy Point (offshore of Stonington); and all islands in the Connecticut part of Fishers Island Sound.
  • Date of Data - Summer 2010.
  • Map Scale and Accuracy - 1:12,000 scale. The ground resolution for this imagery is 1 foot (0.305 meter) per image pixel.

Additional Documentation

  • GIS Metadata - Contains technical documentation describing the 2010 Coastal 4Band Orthophotography data and the data sources, process steps, and standards used to collect and store this information in a geographic information system (GIS).


GIS Data Download

  • Coastal Connecticut 2010 4Band Orthophotography data is available as a statewide mosaic in File Geodatabase format from DEEP GIS Data.
  • Connect GIS and AutoCAD software to this information online using the Ortho 2010 Coast 4Band CT ECO Map Service.