GeoData @ UCB

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1. Global GIS : Hydrography danger points

1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing worldwide navigational hazards or dangers near ocean and navigable lake coastlines and was publishe... American Geological Institute.

2. VMap1 Hydrographic Hazards, Lines

1995. National Geospatial-Intelligence Agency. This datalayer is a polyline coverage representing hydrographic hazards or dangers located throughout current VMap1 geographic coverage areas. Fea...

3. VMap1 Hydrographic Hazards, Points

1995. National Geospatial-Intelligence Agency. This datalayer is a point coverage representing hydrographic hazards or dangers located throughout current VMap1 geographic coverage areas. Featur...

4. VMap1 Hydrographic Hazards, Polygons

1995. National Geospatial-Intelligence Agency. This datalayer is a polygon coverage representing hydrographic hazards or dangers located throughout current VMap1 geographic coverage areas. Feat...