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21. Africa: Flow Accumulation, 30s resolution, 2007

Raster Stanford University Public content
2007. World Wildlife Fund (WWF). HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales)flow accumulation maps define amount of upstream a... U.S. Geological Survey.

22. Africa: River Network, 15s resolution, 2007

Line Stanford University Public content
2007. World Wildlife Fund. This river network (stream lines) map for Africa is derived from the flow direction map for Africa. The flow accumulation map for Africa is used fo... Geological Survey (U.S.).

23. Africa: River Network, 30s resolution, 2007

Line Stanford University Public content
2007. World Wildlife Fund. This river network (stream lines) map for Africa is derived from the flow direction map for Africa. The flow accumulation map for Africa is used fo... Geological Survey (U.S.).

26. African Marine Atlas

Collection Stanford University Public content
2007. The purpose of the African Marine Atlas (AMA) is to identify, collect and organize available geospatial datasets into an atlas of environmental the... Ocean Data and Information Network for Africa.

27. Agriculture Census of the United States, 2007

Polygon Stanford University Public content
2007. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2007 Census of Agriculture by the National Agricultural St... National Atlas of the United States.

28. Airport

Point University of California, Berkeley Public content
2007. Marin County Department of Public Works. Airports data was digitized from known locations under the recommendation of Marin County Department of Public Works. San Rafael (Calif.). County Of Marin.

30. Alabama U.S. Census Block Centroid Populations : ESRI Data & Maps 2007

Point Harvard University Restricted content
2007. Tele Atlas North America, Inc., Environmental Systems Research Institute (Redlands, Calif.), and Harvard Geospatial Library. Alabama U.S. Census Block Centroid Populations represents the populations of the U.S. Census blocks for the state of Alabama. U.S. Census blocks ar... ESRI.

31. Alaska U.S. Census Block Centroid Populations : ESRI Data & Maps 2007

Point Harvard University Restricted content
2007. Tele Atlas North America, Inc., Environmental Systems Research Institute (Redlands, Calif.), and Harvard Geospatial Library. Alaska U.S. Census Block Centroid Populations represents the populations of the U.S. Census blocks for the state of Alaska. U.S. Census blocks are ... ESRI.

37. Arizona U.S. Census Block Centroid Populations : ESRI Data & Maps 2007

Point Harvard University Restricted content
2007. Tele Atlas North America, Inc., Environmental Systems Research Institute (Redlands, Calif.), and Harvard Geospatial Library. Arizona U.S. Census Block Centroid Populations represents the populations of the U.S. Census blocks for the state of Arizona. U.S. Census blocks ar... ESRI.

38. Arkansas U.S. Census Block Centroid Populations : ESRI Data & Maps 2007

Point Harvard University Restricted content
2007. Tele Atlas North America, Inc., Environmental Systems Research Institute (Redlands, Calif.), and Harvard Geospatial Library. Arkansas U.S. Census Block Centroid Populations represents the populations of the U.S. Census blocks for the state of Arkansas. U.S. Census blocks ... ESRI.

39. Arrondissement Boundaries, Senegal, 2007

Line Stanford University Public content
2007. Map Maker Ltd. This line shapefile contains arrondissement boundaries for Senegal as of January 2007. These are the level 3 administrative units (ADM3) for Senega... Map Maker Ltd.

40. Arrondissements, Senegal, 2007

Polygon Stanford University Public content
2007. Map Maker Ltd. This polygon shapefile contains arrondissement boundaries for Senegal as of January 2007. These are the level 3 administrative units (ADM3) for Sen... Map Maker Ltd.