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61. Central America: Drainage Directions, 30s resolution, 2007

2007. World Wildlife Fund (WWF). This drainage direction map for Central America defines the direction of flow from each cell in the conditioned digital elevation model to its stee... U.S. Geological Survey.

62. Central America: Flow Accumulation, 15s 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.

63. Central America: 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.

64. Central America: Void-filled digital elevation model, 15s resolution, 2007

2007. World Wildlife Fund (WWF). This raster layer is a void-filled digital elevation model (DEM) of Central America at 15 arc-seconds resolution. Elevation is expressed in meters ... U.S. Geological Survey.

65. Central America: Void-filled digital elevation model at 30s resolution, 2007

2007. World Wildlife Fund (WWF). HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales) provides hydrographic information in a consistent... U.S. Geological Survey.

66. PAMAP Program - Color Orthophotos Cycle 2: Pennsylvania

2007. This dataset, produced by the PAMAP Program, consists of an orthorectified digital raster image (i.e. orthoimage) with a horizontal ground resoluti...

67. PAMAP Program Land Cover for Pennsylvania, 2005: Pennsylvania

2007. The Pennsylvania State University. The 2005 land cover for Pennsylvania was created through a mix of interpretation of remotely sensed data and use of ancillary data sources. The dat...

68. Purdue Campus: West Lafayette, Indiana, 2007

2007. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu...