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    • 2013 NOAA Topographic Lidar DEM: U.S. Virgin Islands (St. Croix, St. John, St. Thomas)

    Metadata Updated: October 31, 2024

    The United States Virgin Islands Topographic LiDAR Task Order involved collecting and delivering topographic elevation point data derived from multiple return light detection and ranging (LiDAR) measurements on the islands of St. Thomas, St. John, St. Croix and numerous smaller islands and islets in the United States Virgin Islands. The data collected for the project area will exhibit Hydro Flattened DEMs (1m resolution) for inclusion into the NED. The purpose of the data is for use in coastal management decision making, including applications such as flood plain mapping and water rights management. LiDAR was collected at an average of 0.7 meter point spacing for all acquired project areas.

    Overall the DEMs were acceptable, but appear oversampled as a result of low ground point density (heavy vegetation), and is not a contractor issue as a 1 m DEM was specified. Incremental improvements to the DEMs were earned through breakline adjustments. Another characteristic of the USVI lidar data that was observed on all islands is the appearance of divots where there is a single tree or a narrow line of trees that lie in areas of open, bare terrain. The cause appeared to be sub-canopy points that were lower than the surrounding land. In most cases these low points were lower than the true ground surface at those locations, but were classified as ground and retained in the point cloud for use in DEM generation. This issue was not addressed during revisions.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 10, 2024
    Metadata Created Date October 31, 2024
    Metadata Updated Date October 31, 2024
    Reference Date(s) August 29, 2014 (publication)
    Frequency Of Update unknown

    Metadata Source

    Harvested from NOS OCM

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 10, 2024
    Metadata Created Date October 31, 2024
    Metadata Updated Date October 31, 2024
    Reference Date(s) August 29, 2014 (publication)
    Responsible Party NOAA Office for Coastal Management (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:48382
    Access Constraints Cite As: Office for Coastal Management, [Date of Access]: 2013 NOAA Topographic Lidar DEM: U.S. Virgin Islands (St. Croix, St. John, St. Thomas) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/48382., Access Constraints: None, Use Constraints: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of the data may no longer represent actual surface conditions. Users should not use the data for critical applications without a full awareness of its limitations., Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of the PhotoScience, the Office for Coastal Management, or its partners.
    Bbox East Long -64.561957
    Bbox North Lat 18.423828
    Bbox South Lat 17.670388
    Bbox West Long -65.093469
    Coupled Resource
    Frequency Of Update unknown
    Harvest Object Id 3d362681-2a96-4bd6-9487-c8376fc868a5
    Harvest Source Id c0121fd9-df15-4168-ac04-42f6e36a794d
    Harvest Source Title NOS OCM
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-65.093469, 17.670388], [-64.561957, 17.670388], [-64.561957, 18.423828], [-65.093469, 18.423828], [-65.093469, 17.670388]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2013-11-09
    Temporal Extent End 2013-12-10

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