mapSMR | R Documentation |
Data frame with longitude and latitude coordinates of the St. Marys River shoreline (the connecting channel between Lakes Superior and Huron in the Great Lakes basin).
One row for each point, consecutive rows with non-missing values for each line.
Rich Signell, USGS.
NOAA National Geophysical Data Center, (the now defunct) Coastline Extractor, ngdc.noaa.gov/mgg/coast.
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