2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between land and ocean, excluding Antarctica, at crude resolution. Crude represents an 80 percent re... United States. National Geospatial-Intelligence Agency.
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2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between land and ocean, excluding Antarctica, at full (original) resolution. GSHHG data are made ava... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between land and ocean, excluding Antarctica, at high resolution. High-resolution represents an 80 p... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between land and ocean, excluding Antarctica, at intermediate resolution. Intermediate represents an... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between land and ocean, excluding Antarctica, at low resolution. Low represents an 80 percent reduct... United States. National Geospatial-Intelligence Agency.