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21. Africa: Flow Accumulation, 30s resolution, 2007
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
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
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.).
24. Africa: Void-filled digital elevation model, 15s resolution, 2007
2007. World Wildlife Fund. This raster layer is a void-filled digital elevation model (DEM) of Africa at 15 arc-seconds resolution. Elevation is expressed in meters and refer... U.S. Geological Survey.
25. Africa: Void-filled digital elevation model at 30s resolution, 2007
2007. World Wildlife Fund (WWF). This raster layer is a void-filled digital elevation model (DEM) of Africa at 30 arc-seconds resolution. Elevations is in meters referenced to the ... U.S. Geological Survey.
26. Agriculture Census of the United States, 2007
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.
27. Airport
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.
28. Airport Land Use Compatibility Zones: Humboldt County, California, 2007
2007. von Dohlen, Jerry. This polygon shapefile depicts boundaries of Airport Land Use Compatibility Zones in the County of Humboldt, California for the following airports:... Humboldt County Planning and Building Department.
29. Alexander County, North Carolina land parcels, 2007
2007. Boundary Solutions, Inc. Land parcels in Alexander County, North Carolina, 2007.
30. Alexander County, North Carolina roads, 2007
2007. Boundary Solutions, Inc. Roads and highways in Alexander County, North Carolina, 2007.