Orthophotomosaics, elevation point clouds, digital surface elevation models and supporting data from the north coast of Barter Island, Alaska
Dates
Publication Date
2019-02-26
Acquisition
2014-07-01
Acquisition
2014-09-07
Acquisition
2015-07-05
Citation
Gibbs, A.E., Nolan, M., and Snyder, A.G., 2019, Orthophotomosaics, elevation point clouds, digital surface elevation models and supporting data from the north coast of Barter Island, Alaska: U.S. Geological Survey data release, https://doi.org/10.5066/P9964TKX.
Summary
Aerial photographs were collected from a small, fixed-wing aircraft over the coast of Barter Island, Alaska on three separate dates: July 01 2014, September 07 2014, and July 05 2015. Precise aircraft position information and structure-from-motion photogrammetric methods were combined to derive high-resolution orthophotomosaics and elevation point clouds. Ground control acquired using precise positioning were used to co-register the data sets to assess accuracy of the data sets. Data were shifted into common earth-based datum established from surveyed ground control points and edited to remove outliers, structures, and spurious elevation values associated with moving water surfaces. The horizontal coordinate system is WGS84, UTM Zone [...]
Summary
Aerial photographs were collected from a small, fixed-wing aircraft over the coast of Barter Island, Alaska on three separate dates: July 01 2014, September 07 2014, and July 05 2015. Precise aircraft position information and structure-from-motion photogrammetric methods were combined to derive high-resolution orthophotomosaics and elevation point clouds. Ground control acquired using precise positioning were used to co-register the data sets to assess accuracy of the data sets. Data were shifted into common earth-based datum established from surveyed ground control points and edited to remove outliers, structures, and spurious elevation values associated with moving water surfaces. The horizontal coordinate system is WGS84, UTM Zone 7 North meters; vertical coordinates are relative to the GRS80 ellipsoid.
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Purpose
The data were acquired in order to demonstrate the utility of using structure-from-motion photogrammetric methods for deriving digital elevation data using imagery acquired from a fixed-wing aircraft in remote environments. Companion data sets, including orthophotomosaics, elevation point clouds, and digital surface models are used to evaluate fine-scale morphological and volumetric change to beaches and permafrost bluffs.
