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2014. United States. National Geospatial-Intelligence Agency. UNCLASSIFED World Port Index Arctic coverage. Arctic coverage of the NGA World Port Index-Medium Harborsize. Data current as of 11 December 2014. T... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic grounding line and the Antarctic Ocean at crude resolution. Crude re... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic grounding line and the Antarctic Ocean at full (original) resolution... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic grounding line and the Antarctic Ocean at high resolution. High repr... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic grounding line and the Antarctic Ocean at intermediate resolution. I... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic grounding line and the Antarctic Ocean at low resolution. Low repres... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic ice and the Antarctic Ocean at crude resolution. Crude represents an... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic ice and the Antarctic Ocean at full resolution. GSHHG data are made ... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic ice and the Antarctic Ocean at high resolution. High represents an 8... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the shoreline boundary between the Antarctic ice and the Antarctic Ocean at intermediate resolution. Intermediate... United States. National Geospatial-Intelligence Agency.