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21. National Agriculture Imagery Program (NAIP) for Virginia - County Mosaics

2009. USDA-FSA Aerial Photography Field Office. This data set contains imagery from the National Agriculture Imagery Program (NAIP). The NAIP acquires digital ortho imagery during the agricultura...

22. National Agriculture Imagery Program (NAIP) for West Virginia - County Mosaics

2009. USDA-FSA Aerial Photography Field Office. This data set contains imagery from the National Agriculture Imagery Program (NAIP). The NAIP acquires digital ortho imagery during the agricultura...

23. North America: Drainage Directions, 15s resolution, 2009

2009. World Wildlife Fund (WWF). This drainage direction map for North America defines the direction of flow from each cell in the conditioned digital elevation model to its steepe... U.S. Geological Survey.

24. North America: Drainage Directions, 30s resolution, 2009

2009. World Wildlife Fund (WWF). This drainage direction map for North America defines the direction of flow from each cell in the conditioned digital elevation model to its steepe... U.S. Geological Survey.

25. North America: Flow Accumulation, 15s resolution, 2009

2009. 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.

26. North America: Flow Accumulation, 30s resolution, 2009

2009. 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.

27. North America: Void-filled digital elevation model, 15s resolution, 2009

2009. World Wildlife Fund (WWF). This raster layer is a void-filled digital elevation model (DEM) of North America at 15 arc-seconds resolution. Elevation is expressed in meters an... U.S. Geological Survey.

28. Purdue Campus: West Lafayette, Indiana, 2009

2009. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...

29. Sediment Thickness: Bolinas to Pescadero, California, 2010

2009. Sliter, Ray W., Hartwell, Stephen R., Watt, Janet T., Johnson, Samuel Y., and Golden, Nadine E. This layer is a georeferenced raster image containing sediment-thickness data for the areas within the 3-nautical mile limit between Bolinas and Pe... Geological Survey (U.S.).

30. Sediment Thickness: Salt Point to Drakes Bay, California, 2009

2009. Sliter, Ray W., Hartwell, Stephen R., Watt, Janet T., Johnson, Samuel Y., and Pacific Coastal and Marine Science Center. This layer is a georeferenced raster image containing sediment-thickness data for the areas within the 3-nautical mile limit between Salt Point and... Geological Survey (U.S.).