1887 - 2016 USGS CoNED Topobathy DEM (Compiled 2016): New England

Hurricane Sandy was the deadliest and most destructive hurricane of the 2012 Atlantic hurricane season, and the second-costliest with an estimated $71.4 billion (2013 USD). Hurricane Sandy affected 24 states, including the entire eastern seaboard with particularly severe damage in New Jersey and New York. In response to the storm, the U.S. Geological Survey (USGS) Coastal and Marine Geology Program in collaboration with the USGS National Geospatial Program (NGP), and National Oceanic and Atmospheric Administration (NOAA) developed a three-dimensional (3D) 1-meter topobathymetric elevation model (TBDEM) for the New England sub-region including the and adjacent coastline. High-resolution coastal elevation data is required to identify flood, hurricane, and sea-level rise inundation hazard zones and other earth science applications, such as the development of sediment transport and storm surge models. The new TBDEM consists of the best available multi-source topographic and bathymetric elevation data for New York, Connecticut, Rhode Island and Massachusetts coastal areas.The New England TBDEM integrates over 321 different data sources including topographic and bathymetric LiDAR point clouds, hydrographic surveys, side-scan sonar surveys, and multi-beam surveys obtained from USGS, NOAA, the U.S. Army Corps of Engineers (USACE), Federal Emergency Management Agency (FEMA), and other state and local agencies. The LiDAR and bathymetry surveys were sorted and prioritized based on survey date, accuracy, spatial distribution, and point density to develop a model based on the best available elevation data. Because bathymetric data is typically referenced to tidal referenced datums (such as Mean High Water or Mean Low Water), all tidally-referenced heights were transformed into orthometric heights that are normally used for mapping elevation on land (based on the North American Vertical Datum of 1988). The spatial resolution is 1 meter and includes the coastal areas of New York, Connecticut, Rhode Island, and Massachusetts. The temporal range of the input topography and bathymetry is 1887 to 2016.

Original contact information:

Contact Name: Jeffrey Danielson / Dean Tyler *

Contact Org: U.S. Geological Survey

Title: Physical Geographer

Phone: 605-594-6148 / 605-594-2624 *

Email: daniels@usgs.gov / dtyler@usgs.gov *

As a collaboration between the U.S. Geological Survey (USGS) Coastal and Marine Geology Program (CMGP), the National Geospatial Program (NGP), and the NOAA National Centers for Environmental Information (NCEI), the CoNED Applications Project integrates disparate light detection and ranging (LiDAR) and bathymetric data sources into a common 3D database aligned both vertically and horizontally to a common reference system. CoNED Project TBDEM elevation model development is focused in select regions around the U.S. Coast, such as in the Northern Gulf of Mexico (NGOM), the Hurricane Sandy Region, the San Francisco Bay Region, the Pacific Northwest, and the North Slope of Alaska. CoNED Project topobathymetric elevation model (TBDEM) provide a required seamless elevation product for several science application studies such as shoreline delineation, coastal inundation mapping, sediment-transport, sea-level rise, storm surge models, tsunami impact assessment, and also to analyze the impact of various climate change scenarios on coastal regions. The raster elevation topobathymetric elevation product, the Federal Geographic Data Committee (FGDC) metadata, and the spatially referenced metadata are contained in the downloadable bundle. Spatially referenced metadata are contained within an ESRI geodatabase that contains footprints for each of the source input areas. The National Map provides basic elevation information for earth science studies and mapping applications in the United States. The data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, and mapping and visualization applications. References: USGS Butman, Bradford, Valentine, P.C., Middleton, T.J., and Danforth, W.W., 2007, A GIS Library of multibeam data for Massachusetts Bay and the Stellwagen Bank National Marine Sanctuary, Offshore of Boston, Massachusetts: U.S. Geological Survey Data Series 99, DVD-ROM. Gesch, D.B., 2007, The National Elevation Dataset, in Maune, D., ed., Digital Elevation Model Technologies and Applications: The DEM Users Manual, 2nd Edition, in Digital Elevation Model Technologies and Applications: The DEM Users Manual, 2nd Edition, Bethesda, Maryland, American Society for Photogrammetry and Remote Sensing, p. 99-118. Sugarbaker, L.J., Constance, E.W., Heidemann, H.K., Jason, A.L., Lukas, Vicki, Saghy, D.L., and Stoker, J.M., 2014, The 3D Elevation Program initiative-A call for action: U.S. Geological Survey Circular 1399, 35 p. Winters, W.J., Lorenson, T.D., and Paull, C.K., eds., 2007, Initial Report of the IMAGES VIII/PAGE 127 Gas Hydrate and Paleoclimate Cruise on the RV Marion Dufresne in the Gulf of Mexico, 2-18 July 2002: U.S. Geological Survey Open-File Report 2004-1358, one DVD, online at http://pubs.usgs.gov/of/2004/1358/ USGS - Woods Hole Coastal and Marine Science Center Barnhardt, Walter A., Andrews, Brian, D., and Butman, Bradford, 2005, High-Resolution Geologic Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts: U.S. Geological Survey Open-File Report 2005-1293, online at http://woodshole.er.usgs.gov/pubs/of2005-1293/ McMullen, K.Y., Poppe, L.J., Signell, R.P., Denny, J.F., Crocker, J.M., Beaver, A.L., and Schattgen, P.T., 2006, Surficial Geology in Central Narragansett Bay, Rhode Island: Interpretations of Sidescan Sonar and Multibeam Bathymetry: U.S. Geological Survey Open-File Report 2006-1199, online at http://woodshole.er.usgs.gov/pubs/of2006-1199/ Poppe, Lawrence J., Ackerman, Seth D., Doran, Elizabeth F., Moser, Marc, S., Stewart, Helen, F., Forfinski, Nicholas A., Gardner, Uther, L., and Keene, Jennifer A., 2006, Geologic Interpretation and Multibeam Bathymetry of the Sea floor in Southeastern Long Island Sound: U.S. Geological Survey Open-File Report 2006-1059, online at http://woodshole.er.usgs.gov/pubs/of2006-1059/ Poppe, Lawrence J., Ackerman, Foster, David, S., Blackwood, Dann, S., Butman, Bradford, Moser, S.K., and Stewart, H.F., 2006, Sea-Floor Character and Surface Processes in the Vicinity of Quicks Hole, Elizabeth Islands, Massachusetts: U.S. Geological Survey Open-File Report 2006-1357, online at http://woodshole.er.usgs.gov/pubs/of2006-1357/ McMullen, K.Y., Poppe, L.J., Twomey, E.R., Danforth, W.W., Haupt, T.A., and Crocker, J.M., 2007, Sidescan-Sonar Imagery, Multibeam Bathymetry, and Surficial Geologic Interpretations of the Sea Floor in Rhode Island Sound, off Sakonnet Point, Rhode Island: U.S. Geological Survey Open-File Report 2007-1150, online at http://woodshole.er.usgs.gov/pubs/of2007-1150/ McMullen, K.Y., Poppe, L.J., Denny, J.F., Haupt, T.A., and Crocker, J.M., 2007, Sidescan-Sonar Imagery and Surficial Geologic Interpretations of the Sea Floor in Central Rhode Island Sound: U.S. Geological Survey Open-File Report 2007-1366, online at http://woodshole.er.usgs.gov/pubs/of2007-1366/ Poppe, Lawrence J., Ackerman, Foster, David, S., Blackwood, Dann, S., Williams, Jeffress, S., Moser, M.S., Stewart, H.F., and Glomb, K.A., 2007, Sea-Floor Character and Sedimentary Processes of Great Round Shoal Channel, Offshore Massachusetts: U.S. Geological Survey Open-File Report 2007-1138, online at http://woodshole.er.usgs.gov/pubs/of2007-1138/ McMullen, K.Y., Poppe, L.J., Haupt, T.A., and Crocker, J.M., 2008, Sidescan-Sonar Imagery and Surficial Geologic Interpretations of the Sea Floor in Western Rhode Island Sound: U.S. Geological Survey Open-File Report 2008-1181, online at http://woodshole.er.usgs.gov/pubs/of2008-1181/ Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Barnum, S.R., and Brennan, R.T., 2008, Sea-Floor Character and Sedimentary Processes in the Vicinity of Woods Hole, Massachusetts: U.S. Geological Survey Open-File Report 2008-1004, online at http://woodshole.er.usgs.gov/pubs/of2008-1004/ Poppe, L.J., Ackerman, S.D., McMullen, K.Y., Schattgen, P.T., Schaer, J.D., and Doran, E.F., 2008, Interpolation of Reconnaissance Multibeam and Single-Beam Bathymetry Offshore of Milford, Connecticut: U.S. Geological Survey Open-File Report 2008-1146, online at http://woodshole.er.usgs.gov/pubs/of2008-1146/ EAARL Wright, C.W., Kranenburg, C.J., Klipp, E.S., Troche, R.J., Fredericks, Xan, Masessa, M.L., and Nagle, D.B., 2014, EAARL-B coastal topography-Fire Island, New York, pre-Hurricane Sandy, 2012; seamless (bare earth and submerged): U.S. Geological Survey Data Series 888, http://dx.doi.org/10.3133/ds888

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The data obtained through Earth Explorer, http://earthexplorer.usgs.gov, and The National Map Viewer, http://nationalmap.gov/viewer.html, is considered to be the "best available" data from the USGS. For questions on distribution, please refer to the Distribution Section, Contact Information. For processing, please see Data Quality Section, Processing Step, and Contact Information.

This collection of high-resolution coastal elevation data is available in a user-friendly Georeferenced Tagged Image File Format (GeoTIFF). The elevation model has floating point numeric values. Areas where data is incomplete due to lack of full image coverage or NoData are represented with the numeric value of -3.40282346639e+038.

Spatially referenced metadata are contained within an ESRI vector shapefile that contains footprints with accompanying attribute fields for each of the source input areas.

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Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is

made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may

have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may

be updated without notification. The USGS, NOAA, NOAA OCM and it partners shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.

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This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6194;

Any acquisition or use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Ensure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.

There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. These data should not be used for navigation purposes. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the USGS. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959

The horizontal accuracy for the integrated topobathymetric model was not assessed quantitatively.

The vertical accuracy of the input topographic data varies depending on the input source. Because the input elevation data were derived primarily from LiDAR, the vertical accuracy ranges from 15 to 20 centimeters in root mean square error (RMSE). The vertical accuracy for the integrated topobathymetric model was not assessed quantitatively.

Visual inspection

Visual inspection