1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing worldwide miscellaneous hydrography point features and was published as part of the USGS Global GIS... American Geological Institute.
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2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between island ponds and islands at low resolution. GSHHG data are made available at 5 resolutions, ... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between island ponds and islands at high resolution. High represents an 80 percent reduction in size... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between island ponds and islands at intermediate resolution. Intermediate represents an 80 percent r... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between island ponds and islands at low resolution. Low represents an 80 percent reduction in size a... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at crude resolution. Lake islands, or inland islands, are landmasses ... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at full resolution. Lake islands, or inland islands, are landmasses i... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at high resolution. Lake islands, or inland islands, are landmasses i... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at intermediate resolution. Lake islands, or inland islands, are land... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at low resolution. Lake islands, or inland islands, are landmasses in... United States. National Geospatial-Intelligence Agency.