1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing airports and airfields worldwide and was published as part of the USGS Global GIS : global coverage... American Geological Institute.
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1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing country political boundaries worldwide and was published as part of the USGS Global GIS : global ... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing large urban areas (built-up areas) worldwide and was published as part of the USGS Global GIS : g... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing larger perennial water bodies and rivers worldwide and was published as part of the USGS Global G... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing railroads worldwide and was published as part of the USGS Global GIS : global coverage database.... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing major roads and trails worldwide and was published as part of the USGS Global GIS : global cover... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing smaller rivers and streams worldwide and was published as part of the USGS Global GIS : global c... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a point coverage representing the locations of springs/water holes/wells, dams/weirs, river rapids, and waterfalls worldwide and ... American Geological Institute.
1997. United States. National Imagery and Mapping Agency. This datalayer is a polyline coverage representing various utility line features (including pipelines, power transmission lines and communication l... American Geological Institute.
2002. Environmental Systems Research Institute (Redlands, Calif.), Geological Survey (U.S), and American Geological Institute. This datalayer is a polygon coverage representing First-Order Administrative Areas worldwide (as they existed in 2002) and was originally produced ... American Geological Institute.
