1997. National Imagery and Mapping Agency. Water Depth Lines (Bathymetry) is a polyline theme representing hydrographic depth contour lines located throughout the World. This dataset is par... National Imagery and Mapping Agency.
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1997. National Imagery and Mapping Agency. World Contour Lines is a polyline theme representing land elevation throughout the world. This dataset is part of the Vector Map Level 0 database.... National Imagery and Mapping Agency.
1997. National Imagery and Mapping Agency. World Spot Elevations is a point theme representing spot elevations world wide. This dataset is part of the Vector Map Level 0 database. The Vecto... National Imagery and Mapping Agency.