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  • Ground control and transect points collected during unmanned aerial systems (UAS) flights: Plum Island Estuary and Parker River NWR (PIEPR), February 27th, 2018

    Metadata Updated: November 12, 2020

    Low-altitude (80 and 100 meters above ground level) digital images were taken over an area of the Plum Island Estuary and Parker River National Wildlife Refuge (NWR) in Massachusetts using 3DR Solo unmanned aircraft systems (UAS) on February 27, 2018. These images were collected as part of an effort to document marsh stability over time and quantify sediment movement using UAS technology. Each UAS was equipped with either a Ricoh GRII digital camera for natural color photos, used to produce digital elevation models and ortho images, or a MicaSense RedEdge multi-spectral camera that captures five specific bands of the visible spectrum (blue, green, red, red edge, and near-infrared), which can be used to classify vegetation. The MicaSense camera covered a smaller subsection of the same polygonal area of the marsh that the Ricoh imaged. Some photographs contain black and white targets used as ground control points (GCPs), which were surveyed by a field crew with a high-precision Real Time Kinematic Global Position System. This data release includes the original images from both cameras, as well as a csv file containing the latitude and longitude coordinates, in Universal Transverse Mercator Zone 19 referenced to the North American Datum of 1983, of the ground control points needed to complete any photogrammetry projects using the original photographs, and GPS transect points used to evaluate the photogrammetry products created.

    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.

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    Dates

    Metadata Date August 6, 2020
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Reference Date(s) January 1, 2019 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from DOI Open Data

    Graphic Preview

    Browse graphic showing the locations of the ground control points and the transect points.

    Additional Metadata

    Resource Type Dataset
    Metadata Date August 6, 2020
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Reference Date(s) January 1, 2019 (publication)
    Responsible Party U.S. Geological Survey (Point of Contact)
    Contact Email
    Guid
    Access Constraints Use Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information., Access Constraints: None
    Bbox East Long -70.805726
    Bbox North Lat 42.777831
    Bbox South Lat 42.769101
    Bbox West Long -70.821671
    Coupled Resource
    Frequency Of Update notPlanned
    Graphic Preview Description Browse graphic showing the locations of the ground control points and the transect points.
    Graphic Preview File https://www.sciencebase.gov/catalog/file/get/5c98d30ce4b0b8a7f6288b7c?name=2018015FA_gcptrans_browse.jpg
    Graphic Preview Type JPEG
    Licence Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
    Metadata Language
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True

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