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    • Mapping Extent for Sidescan Sonar and Bathymetry Data, 2014-2015, Gateway National Recreation Area

    Metadata Updated: March 3, 2026

    Polygon shapefile showing the coverage area of the acoustic mapping at Sandy Hook, NJ between July 2015 and August 2015. The side scan sonar survey was done simultaneously with the bathymetry swath survey and used an EdgeTech Model 4125 Towfish bow-mounted from Lookdown at 400 and 900 kHz. The 4125 Towfish utilizes EdgeTech’s Full Spectrum CHIRP technology to produce higher resolution images than a non-CHIRP system. EdgeTech Discovery Software was used to acquire the side scan sonar data using the JSF format at a resolution of about 2.3 cm. All JSF files collected using EdgeTech’s Discover Software were processed using John Gann’s Chesapeake Technology SonarWiz5. Dimensions of contacts should be considered accurate to +/- 30% of the measured dimensions. This system also records the direct arrival intensity data.

    Access & Use Information

    Public: This dataset is intended for public access and use. 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 Created Date January 14, 2026
    Metadata Updated Date March 3, 2026

    Metadata Source

    Harvested from DOI NPS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 14, 2026
    Metadata Updated Date March 3, 2026
    Publisher National Park Service
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/NPS_DataStore_2278676
    Data First Published 2017-02-10T00:00:00Z
    Data Last Modified 2017-02-10T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:24
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/nps-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 3ce39f6d-43f5-4fef-ac88-cfb5b6942844
    Harvest Source Id d917c1a9-26b7-43ea-b8c5-c77ec750a850
    Harvest Source Title DOI NPS DCAT-US
    Homepage URL https://irma.nps.gov/DataStore/Reference/Profile/2278676
    Metadata Type geospatial
    Old Spatial -74.14016,40.3950768,-73.77641,40.65834
    Program Code 010:118, 010:119
    Source Datajson Identifier True
    Source Hash 0e07ac78451dd237926528df01db355ddbe7b230ec452d67f383b2386678dc2f
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -74.14016, 40.3950768, -74.14016, 40.65834, -73.77641, 40.65834, -73.77641, 40.3950768, -74.14016, 40.3950768}
    Temporal 2015-07-01/2015-08-01

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