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Satellite video and individual image frames from the Tanana River, Alaska, July 14, 2020, for Particle Image Velocimetry

Metadata Updated: July 6, 2024

This data release consists of a video and individual image frames extracted from the original high frame rate video and used to derive remotely sensed estimates of surface flow velocity via particle image velocimetry (PIV). These data were acquired from the Tanana River near Nenana, Alaska, on July 14, 2020. The video was obtained from a satellite operated by Planet Labs as part of the SkySat constellation. The original video was recorded at 30 frames per second and is provided in a compressed, lower-resolution .mp4 format video file for viewing. In addition, Planet Labs provided the individual frames comprising the video as full resolution TIFF images. This data release consists of individual frames extracted at a reduced frame rate of 1 frame per second (1 Hz). The original images were not geo-referenced and had to be stabilized to account for motion of the satellite platform during acquisition. Image stabilization was performed using the TrakEM2 plugin to the ImageJ software package. The stabilized image sequence was then geo-referenced in the Global Mapper software package using tie points selected from an orthophoto of the Tanana River study area available from a related data release. A spatial transformation based on these tie points and control points was derived in MATLAB and then applied to the images to project them into the UTM Zone 6N, NAD83 coordinate system. The resulting geo-referenced images had a spatial resolution (pixel size) of 0.925 m and effectively stabilized the image sequence prior to PIV analysis. The grayscale images were saved as TIF files with corresponding world files (*.tfw) that contain the spatial referencing information for each image. The sequence consists of 17 individual images representing 17 seconds of data collection. The entire sequence of TIF images and world files is contained within a zip archive.

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.

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Dates

Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/dcc71ce8d5b263ba7d5d8fc7cfbacdf9
Identifier USGS:5fb7cff1d34eb413d5e14821
Data Last Modified 20210503
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datainventory.doi.gov/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 29afafd4-58dd-4c6e-8aaa-5eec37ea2974
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -149.12773,64.54933,-149.05014,64.57159
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 9f9dac689c77fbcd02a3a774f84e1b770b13e460fb26282193d91cc5275af672
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -149.12773, 64.54933, -149.12773, 64.57159, -149.05014, 64.57159, -149.05014, 64.54933, -149.12773, 64.54933}

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