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2004. Instituto Nacional de Estadística, Geografía e Informática (Mexico), Geological Survey (U.S.), and Canada Centre for Remote Sensing. This polygon shapefile shows areas of permanent ice found on the North America landmass including Greenland, and also shows areas of land found wit... Geological Survey (U.S.).
2017. GLIMS. This polygon shapefile contains glacier outlines for the Antarctic and Subantarctic region. These data also include an ancillary CSV file containin... GLIMS.