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2002, 2003, and 2004. Geological Survey (U.S.). This point shapefile portrays major dams of the United States, including Puerto Rico and the U.S. Virgin Islands. The map layer was created by extr... Geological Survey (U.S.).
2006. Rawson, Peg. This point shapefile depicts major dams in the United States, including Puerto Rico and the U.S. Virgin Islands. The map layer was created by extra... United States. Bureau of Transportation Statistics.
2003. This polygon shapefile depicts major discharges into Southern California's near-coastal marine waters, but does not include discharges into enclose... California. Department of Fish and Game. Marine Resources Region.
2018. Calaveras County GIS. This dataset shows the Major Lakes for Calaveras County, California. It was downloaded from https://opendata-calaveras-gis.opendata.arcgis.com/data... Calaveras County GIS.
2013. Waterborne Commerce Statistics Center (U.S.) and United States. Bureau of Transportation Statisticsf. This point shapefile depicts ports politically defined by port limits or USACE projects, excluding non-USACE projects not authorized for publicatio... United States. Bureau of Transportation Statistics.
2018. Calaveras County GIS. This dataset shows the Major Rivers for Calaveras County, California. It was downloaded from https://opendata-calaveras-gis.opendata.arcgis.com/dat... Calaveras County GIS.
1997. United States. National Imagery and Mapping Agency. This line shapefile depicts the major rivers in Kenya. These data were created by the U.S. National Imagery and Mapping Agency in 1997. This layer ... United States. National Imagery and Mapping Agency.
2019. Yuba County (Calif.). Information Technology Services. This line shapefile represents major rivers in Yuba County, California. This layer is a part of a collection of data obtained from the Yuba County ... Yuba County (Calif.). Information Technology Services.
1997. Geological Survey of Kenya and International Livestock Research Institute. This line shapefile shows major roads in Kenya. These data were originally produced as a 1:250,000 topographic map by the Geological Survey of Keny... World Resources Institute.
1991. Powell, Susan and Navarro, Fernando. This line dataset represents the locations of major roads in Mongolia in 1991. The dataset was developed as part of the Mongolian 20th-century Hist... UC Berkeley Library.