1997. National Imagery and Mapping Agency. World Roads is a polyline theme representing roadways world wide. This dataset is part of the Vector Map Level 0 database. The Vector Map (VMap) L... National Imagery and Mapping Agency.
1997. National Imagery and Mapping Agency. World Sand Areas is a polygon theme representing desertified regions world wide. Features in this layer have FACC (Feature and Attribute Coding Ca... National Imagery and Mapping Agency.
1997. National Imagery and Mapping Agency. World Sea Ice is a polygon theme representing areas of sea or pack ice throughout the world. Features in this layer have an FACC (Feature and Attr... National Imagery and Mapping Agency.
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 lakes and land at crude resolution. Crude represents an 80 percent reduction in size and qua... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lakes and land at full (original) resolution. GSHHG data are made available at 5 resolutions... United States. National Geospatial-Intelligence Agency.