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Historical coastal bluff edge positions at Barter Island, Alaska for the years spanning 1950 to 2020

Dates

Publication Date
Start Date
1950-08-02
End Date
2020-07-10

Citation

Gibbs, A.E., Jones, B.M., and Richmond, B.M., 2020, A GIS compilation of vector shorelines and coastal bluff edge positions, and associated rate-of-change data for Barter Island, Alaska: U.S. Geological Survey data release, https://doi.org/10.5066/P9CRBC5I.

Summary

This dataset includes one vector shapefile delineating the position of the top edge of the coastal permafrost bluffs at Barter Island, Alaska spanning seven decades, between the years of 1950 and 2020. Bluff-edge positions delineated from a combination of aerial photography, declassified satellite photography, and very-high resolution satellite imagery can be used to quantify the movement of the bluff edge through time. These data were used to calculate rates of change every 10 meters alongshore using the Digital Shoreline Analysis System (DSAS) version 5.0. DSAS uses a measurement baseline method to calculate rate-of-change statistics. Transects are cast from the reference baseline to intersect each bluff edge vector, establishing [...]

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Attached Files

Click on title to download individual files attached to this item.

Shapefile: BarterIsland_BluffEdge_1950to2020.zip
BarterIsland_BluffEdge_1950to2020.CPG 5 Bytes
BarterIsland_BluffEdge_1950to2020.dbf 70.67 KB
BarterIsland_BluffEdge_1950to2020.prj 424 Bytes
BarterIsland_BluffEdge_1950to2020.shp 645.02 KB
BarterIsland_BluffEdge_1950to2020.shx 3.93 KB

Purpose

These data are part of a series of data quantifying rates and patterns of shoreline change and coastal permafrost bluff retreat from 1947 to 2020 at Barter Island, Alaska.

Additional Information

Shapefile Extension

boundingBox
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minX-143.70709024600055
maxY70.13566521256408
maxX-143.61913385289412
files
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dateUploadedTue Dec 01 20:48:51 MST 2020
nameBarterIsland_BluffEdge_1950to2020.dbf
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nameBarterIsland_BluffEdge_1950to2020.prj
contentTypetext/plain
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imageHeight435
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dateUploadedTue Dec 01 20:48:51 MST 2020
nameBarterIsland_BluffEdge_1950to2020.shp
contentTypex-gis/x-shapefile
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dateUploadedTue Dec 01 20:48:51 MST 2020
nameBarterIsland_BluffEdge_1950to2020.shx
contentTypex-gis/x-shapefile
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size4028
dateUploadedTue Dec 01 20:48:51 MST 2020
geometryTypeMultiLineString
nameBarterIsland_BluffEdge_1950to2020
nativeCrsEPSG:26907

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