This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This layer is a hydro-flattened bare earth digital elevation model (DEM) derived from the classified Lidar point cloud covering the state of Connecticut.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. The Shaded Relief service is created by applying the shaded relief function to the bare earth Elevation service.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. The Hillshade service is created by applying the hillshade function to the bare earth Elevation service.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This layer is a hydro-flattened bare earth digital elevation model (DEM) derived from the classified Lidar point cloud covering the state of Connecticut.

Product: These lidar data are processed Classified LAS 1.4 files, formatted to 23,381 individual 2,500 ft x 2,500 ft tiles; used to create intensity images, 3D breaklines and hydro-flattened DEMs as necessary. Geographic Extent: CT Statewide covering approximately 5,241 square miles. Dataset Description: CT Statewide GIS Services Lidar project called for the Planning, Acquisition, proces...

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This dataset covers 1772 square miles of eastern Connecticut. Raster functions can be applied using the link below.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This dataset covers 141 square miles of southeastern Connecticut. Raster functions can be applied using the link below.Dataset InformationExtent: Extreme southeastern Connecticut, 141 square milesDates: 2011Data Info: Digital Elevation Model (DEM), which is a bare earth elevation raster, with no functions applied. Functions can be applied to service include aspect, hillshade, shaded relief, and slope. Pixel Resolution: 2 meter DEM raster derived from Lidar point cloud Projection: UTM Zone 19, NAD83 meters, NAVD88 metersService Projection: WGS 1984 Web Mercator Auxiliary Sphere (EPSG 3857)More Information- Raster Functions- More Information- MetadataCredit and FundingThis dataset was collected as part of the New England Lidar program with credit to the United States Geological Survey (USGS) and State of Maine's GIS Office. Photo Science Inc. collected the data.

These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientist...

Product: These are Digital Elevation Model (DEM) data for CT Statewide GIS Services as part of the required deliverables for the CT Statewide GIS Services Lidar project. Class 2 (ground) lidar points in conjunction with the hydro breaklines were used to create a 2 foot hydro-flattened Raster DEM. Geographic Extent: CT Statewide covering approximately 5,241 square miles. Dataset Description:...

This metadata record describes the hydro-flattened bare earth digital elevation model (DEM) derived from the classified LiDAR data for the 2016 Connecticut Lidar project covering approximately 5,240 square miles.

Original contact information: Contact Org: NOAA Office for Coastal Management Phone: 843-740-1202 Email: coastal.info@noaa.gov

Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

The Download Tool is available through CT ECO, a partnership between UConn CLEAR and CT DEEP. The tool provides easy download access to aerial imagery and lidar elevation collected during multiple flights.

This data release contains coastal wetland synthesis products for the state of Connecticut. Metrics for resiliency, including the unvegetated to vegetated ratio (UVVR), marsh elevation, tidal range, wave power, and exposure potential to environmental health stressors are calculated for smaller units delineated from a digital elevation model, providing the spatial variability of physical factors that influence wetland health. The U.S. Geological Survey has been expanding national assessment of coastal change hazards and forecast products to coastal wetlands with the intent of providing federal, state, and local managers with tools to estimate the vulnerability and ecosystem service potential of these wetlands. For this purpose, the response and resilience of coastal wetlands to physical factors need to be assessed in terms of the ensuing change to their vulnerability and ecosystem services. This project has been funded in part by the United States Environmental Protection Agency under assistance agreement DW-014-92531201-1 to N. Ganju.

Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

Bathymetry for Long Island Sound was derived from fifty-five surveys containing 562,596 soundings. Twenty-four older, less accurate, overlapping surveys were entirely omitted, and the overlap from eight older, less accurate surveys was omitted before tinning the data. The average separation between soundings was 77 meters. The fifty-five surveys used dated from 1931 to 1990. Approximately 40 percent of the surveys were from 1931 to 1939. The total range of sounding data was 2.1 meters to - 113.4 meters at mean low water. Mean high water values between 0.6 and 2.3 meters were assigned to the shoreline. Eighty-eight points were found that were not consistent with the surrounding data. These were removed prior to tinning. DEM grid values outside the shoreline (on land) were assigned null values (-32676). Long Island Sound has fifty-one 7.5 minute DEMs and five one degree DEMs. The 1 degree DEMs were generated from the higher resolution 7.5 minute DEMs which covered the estuary. A Digital Elevation Model (DEM) contains a series of elevations ordered from south to north with the order of the columns from west to east. The DEM is formatted as one ASCII header record (A- record), followed by a series of profile records (B- records) each of which include a short B-record header followed by a series of ASCII integer elevations (typically in units of 1 centimeter) per each profile. The last physical record of the DEM is an accuracy record (C-record). The 7.5-minute DEM (30- by 30-m data spacing) is cast on the Universal Transverse Mercator (UTM) projection. It provides coverage in 7.5- by 7.5-minute blocks. Each product provides the same coverage as a standard USGS 7.5-minute quadrangle but the DEM contains over edge data. Coverage is available for many estuaries of the contiguous United States but is not complete.

Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

LIDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. Using a combination of laser rangefinding, GPS positioning and inertial measurement technologies; LIDAR instruments are able to make highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures and vegetation. This data was collected at submeter resolution to...

Geographic Extent: Connecticut River Watershed (4,437 sq mi), Winnipesaukee River Watershed (796 sq mi), and portions of the White Mountain National Forest (WMNF) in New Hampshire (181 sq mi), covering approximately 5,233 total square miles. Dataset Description: The Connecticut River Watershed 2015 project called for the planning, acquisition, processing and derivative products of LIDAR dat...

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This dataset covers 658 square miles of northwestern Connecticut. Raster functions can be applied using the link below.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This layer is lidar point intensity covering the state of Connecticut. Lidar intensity is a measure of the return strength of each lidar point. Here, the points are converted to 1 foot pixels and values range from 1-256 where low numbers are low reflectivity and high numbers are high reflectivity. Intensity in influenced by reflectivity of the surface at the sensor wavelength (here, 1064nm which is near-infrared), view angle, range, surface composition, roughness, and moisture content and should therefore be used as a relative measure. Intensity is not influenced by sunlight or shadows. Visit the CT ECO Map and Image Services page for a complete list of available elevation services. Dataset InformationExtent: ConnecticutDates: 2023 (March 27 - April 13), between snow melt and leaf outData Info: statewide raster of lidar point densityPixel Resolution: 1 foot pixel raster derived from QL1+ Lidar point cloud with a minimum of 15 points per square meter inland and 20 points per square meter along the coast. Projection: CT State Plane NAD 83 (2011) Feet (EPSG 6434)Service Projection: WGS 1984 Web Mercator Auxiliary Sphere (EPSG 3857)More Information- All About the 2023 Data Collection (Imagery and Lidar)- All about Connecticut Lidar Elevation- Lidar Elevation on CT ECO Explained- Metadata xml format- Download DEM and pointsCredit and Funding