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    • Air Gap Data from CO-OPS

    Metadata Updated: October 31, 2024

    The Center for Operational Oceanographic Products and Services (CO-OPS) of the National Ocean Service (NOS), an organizational element of NOAA, operates and maintains a network of downward-looking long-range microwave sensors for determining the instantaneous clearance or air gap below bridges that span navigable waterways in the U.S. These observations are part of the National Physical Oceanographic Real-Time System (PORTS) Program. The data collected are used to ensure safety of navigation, improve economic efficiency, and protect coastal resources. Included in this data collection are preliminary 6-minute air gap observations from various bridges spanning navigable waterways in the U.S.

    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 February 29, 2024
    Metadata Created Date October 31, 2024
    Metadata Updated Date October 31, 2024
    Reference Date(s) 2004-11 (creation), 2004-11 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOS CO-OPS

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date February 29, 2024
    Metadata Created Date October 31, 2024
    Metadata Updated Date October 31, 2024
    Reference Date(s) 2004-11 (creation), 2004-11 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:71336
    Access Constraints Cite As: Center for Operational Oceanographic Products and Services, [Date of Access]: Air Gap Data from CO-OPS [Data Date Range], https://www.fisheries.noaa.gov/inport/item/71336., Access Constraints: none, Use Constraints: The air gap systems have been created by NOAA/NOS to provide the maritime community with improved information of bridge clearances. These real-time data are accurate to within +/- 1 inch. They are released for limited public use as preliminary data to be used only with appropriate caution when clearing the bridge., Distribution Liability: The air gap systems have been created by NOAA/NOS to provide the maritime community with improved information of bridge clearances. These real-time data are accurate to within +/- 1 inch. They are released for limited public use as preliminary data, to be used only with appropriate caution when clearing the bridge.
    Bbox East Long -74
    Bbox North Lat 41
    Bbox South Lat 27
    Bbox West Long -123
    Coupled Resource
    Frequency Of Update asNeeded
    Harvest Object Id 52cc62db-d4be-479e-92be-506f2a79bfc8
    Harvest Source Id 217272a2-c20f-4b9e-a0e1-e42a6d539971
    Harvest Source Title NOS CO-OPS
    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 Air gap observations are collected at a high frequency and updated for the public every six minutes to account for changes in water level, vehicular loads on the bridge, air temperature, and other factors.
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-123.0, 27.0], [-74.0, 27.0], [-74.0, 41.0], [-123.0, 41.0], [-123.0, 27.0]]]}
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System EPSG::4269
    Spatial Harvester True
    Temporal Extent Begin 2004-11-01

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