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Add ice shelf regions
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Regions covering 100 ice shelves are added.  Where ice shelves
intersect multiple IMBIE basins, they have been divided into
numbered subregions.  All features are tagged with the ice-shelf
name, the IMBIE basin name, and the IMBIE region name.

Each region covers not just the present-day location of the shelf
but also all parts of a given basin that are closer to that shelf
than any other shelf.  The regions extend to the continental-shelf
break as defined by the -800 m contour.  Thus, the regions should
be useful as shelves advance or retreat over time.
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@xylar
xylar committed Jan 31, 2016
1 parent 0b0de99 commit 6475a30
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3,306 changes: 3,306 additions & 0 deletions iceshelves/region/Abbot/region.geojson
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385 changes: 385 additions & 0 deletions iceshelves/region/Atka/region.geojson
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{"type": "FeatureCollection",
"features":
[
{"type": "Feature",
"properties": {
"name": "Atka",
"component": "iceshelves",
"tags": "Atka;Antarctica_IMBIE5;EastAntarcticaIMBIE",
"author": "Xylar Asay-Davis",
"object": "region"
},
"geometry":
{"type": "Polygon",
"coordinates":
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}
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