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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    Hydrography Lines 2015

    Metadata Updated: February 4, 2025

    Hydrography lines. The dataset contains polygons representing planimetric hydrography, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO). This is a complete new capture from aerial photography flown in mid to Late April, completed on April 24, 2015. This is part of a comprehensive sensor collection effort to sychronize orthophotos, oblique imagery, LiDAR, and basemap layers. The following planimetric layers were updated:

    - Barrier Lines

    - Building Polygons

    - Bridge and Tunnel Polygons

    - Curb Lines

    - Grate Points

    - Horizontal and Vertical Control Points

    - Hydrography Lines

    - Obscured Area Polygons

    - Railroad Lines

    - Road, Parking, and Driveway Polygons

    - Sidewalk and Stair Polygons

    - Swimming Pools

    - Water Polygons

    DUE TO THE LOW ALTITUDE FLOWN TO CAPTURE THE COMPLETE IMAGERY FOR THE 2015 SENSOR FLIGHT, THERE IS INCOMPLETE AERIAL PHOTOGRAPHY COVERAGE AROUND THE WHITE HOUSE AND CAPITOL. FOR THESE AREAS, 2013 PLANIMETRIC FEATURES WERE SEEMLESSLY MERGED INTO THE 2015 DATA.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: Creative Commons Attribution

    Downloads & Resources

    Dates

    Metadata Created Date April 30, 2024
    Metadata Updated Date February 4, 2025

    Metadata Source

    Harvested from DC data

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 30, 2024
    Metadata Updated Date February 4, 2025
    Publisher D.C. Office of the Chief Technology Officer
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=0d317a90f8ac4c5c8cc09baed0681f45&sublayer=4
    Data First Published 2018-07-19T20:58:32.000Z
    Data Last Modified 2021-12-13T20:50:15.000Z
    Category geospatial
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    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 320dab00-20af-4262-ac11-9d46373bb40c
    Harvest Source Id b05f955a-65d6-4288-9558-15a5ebc74e36
    Harvest Source Title DC data
    Homepage URL https://opendata.dc.gov/datasets/DCGIS::hydrography-lines-2015
    License https://creativecommons.org/licenses/by/4.0
    Metadata Type geospatial
    Old Spatial -77.1127,38.7996,-76.9246,38.9877
    Source Datajson Identifier True
    Source Hash 0589d26534575077246905b252fcb22a1f27e23d2941411d45880c9c0361587d
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -77.1127, 38.7996, -77.1127, 38.9877, -76.9246, 38.9877, -76.9246, 38.7996, -77.1127, 38.7996}

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