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The non-regional ocean converted into a single SpatialPolygons object. The boundaries of the non-regional ocean were defined by modifying the region masks provided by the National Snow and Ice Data Center (NSIDC).
SpatialPolygons
bg_water
SpatialPolygons object
Region Mask: National Snow and Ice Data Center, 2017: Region mask for the northern hemisphere. http://nsidc.org/data/polar-stereo/tools_masks.html.
# NOT RUN { data(bg_water) plot(bg_water) # }
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