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 service (called Statewide2023) will persist as other elevation dates become available. Connect to the Elevation service to always have the latest and greatest service without changing the connection. Visit the CT ECO Map and Image Services page for a complete list of available elevation services. 2023 Statewide Extent: ConnecticutDates: 2023 (March 27 - April 13), between snow melt and leaf outData Info: statewide Digital Elevation Model (DEM), which is a bare earth elevation raster with no functions applied Pixel Resolution: 2 foot DEM 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. The bare earth elevation from the points were averaged to get the elevation value for each pixel in the DEM. 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 formatTips- The elevation service contains processing templates like hillshade, slope, and aspect, that can be applied to change the appearance of the layer. - Symbology is another useful and easy way to display the elevation differently. Credit and Funding

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. 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 Apsect service is created by applying the aspect function to the bare earth Elevation service.

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.Dataset InformationExtent: Eastern Connecticut, 1772 sq milesDates: 2010 (November 3 - December 11), leaf offData 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: 1 meter DEM raster derived from Lidar point cloud Projection: UTM Zone 18N, NAD83 meters, NAVD88 metersService Projection: WGS 1984 Web Mercator Auxiliary Sphere (EPSG 3857)More Information- Raster Functions- More Information- MetadataCredit and FundingUSDA Natural Resource Conservation Service (NRCS). Dewberry and Earth Eye LLC collected the data.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This dataset covers 1527 square miles of central Connecticut including the Connecticut River. Raster functions can be applied using the link below.Dataset InformationExtent: Central Connecticut, 1527 sq milesDates: 2014 (April 22 - May 29), leaf onData 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: 1 meter DEM raster derived from Lidar point cloud Projection: UTM Zone 18N, NAD83 2011 meters, NAVD88 metersService Projection: WGS 1984 Web Mercator Auxiliary Sphere (EPSG 3857)More Information- Raster Functions- More Information- MetadataCredit and FundingThe United States Geological Survey (USGS). Dewberry collected the data.

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 dataset covers 455 square miles of southwestern Connecticut. Raster functions can be applied using the link below.Dataset InformationExtent: Southwestern Connecticut, 455 sq miles Date: 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 18, 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.

This image service is available through CTECO, a partnership between UConn CLEAR and CT DEEP. This dataset covers 116 square miles of Connecticut's coast. Raster functions can be applied using the link below.Dataset InformationExtent: Coastal Connecticut, 116 sq milesDates: 2012 (November 11 - December 16), leaf offData 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: 1 meter DEM raster derived from Lidar point cloud Projection: Geographic, NAD83 meters, NAVD88 metersService Projection: WGS 1984 Web Mercator Auxiliary Sphere (EPSG 3857)More Information- Raster Functions- More Information- MetadataCredit and FundingNOAA Office for Coastal Management, US Army Corps of Engineers. Fugro Earthdata, Inc. collected the data.

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

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

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

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...

This feature service is available through CT ECO, a partnership between UConn CLEAR and CT DEEP. The tile grid service is as an index for accessing aerial imagery and lidar elevation data files for Connecticut and is used in the Download Tool.

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 un ...

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. 2016 Statewide (Shaded Relief)Extent: ConnecticutDates: 2016 (March 11 - April 16), between snow melt and leaf outData Format: Shaded Relief function applied to Elevation service which is a statewide DEM (Digital Elevation Model). Pixel Resolution: 1 meter DEM raster derived from Lidar point cloud 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 2016 Data Collection (Imagery and Lidar) - All about Connecticut Lidar Elevation- Lidar Elevation on CT ECO Explained- More about Shaded Relief on CT ECO- MetadataCredit and FundingCapitol Region Council of Governments (CRCOG), in cooperation with other COGs, with funding from the Office of Policy and Management's (OPM) Regional Performance Incentive Program with contributions from the Connecticut Department of Transportation (DOT) and Department of Emergency Services and Public Protection (DESPP). The Sanborn Map Company collected the data.

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.