1992. National Imagery and Mapping Agency (now National Geospatial-Intelligence Agency). This datalayer is a polyline coverage representing various utility features found throughout DCW (Digital Chart of the World) geographic coverage a... National Imagery and Mapping Agency.
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1995. National Geospatial-Intelligence Agency. This datalayer is a polyline coverage representing penstocks or pipelines located throughout current VMap1 geographic coverage areas. Features in t...
1995. National Geospatial-Intelligence Agency. This datalayer is a polyline coverage representing pipelines located throughout current VMap1 geographic coverage areas. Associated tabular data de...
1995. National Geospatial-Intelligence Agency. This datalayer is a point coverage representing pumping stations located throughout current VMap1 geographic coverage areas. Pumping stations for o...