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51. 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.

52. Commercial Shipping Activity, 2007-2008

2007. National Center for Ecological Analysis and Synthesis. This raster layer represents global commercial shipping activity including location and travel routes. Commercial shipping activity can lead to shi... Science.

53. Depth to Transition: Bolinas to Pescadero, California, 2010

2007. Pacific Coastal and Marine Science Center, Chin, John L., Johnson, Samuel Y., Ross, Stephanie L., and Sliter, Ray W. This layer is a georeferenced raster image of the depth to transition (base) map of uppermost Pleistocene and Holocene sediments in the region of B... Geological Survey (U.S.).

54. Depth to Transition: Santa Barbara Channel, California, 2009

2007. Wong, Florence L., Phillips, Eleyne L., Johnson, Samuel Y., Pacific Coastal and Marine Science Center, and Golden, Nadine E. This layer is a georeferenced raster image of the depth to transition (base) map of uppermost Pleistocene and Holocene sediments in the Santa Barba... Geological Survey (U.S.).

55. Dry Nitrogen Deposition: San Francisco Bay Area, California, 2007

2007. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, GreenInfo Network (Firm), and University of California, Riverside. College of Engineering. Center for Environmental Research and Technology. This raster dataset depicts dry nitrogen deposition for the nine county San Francisco Bay Area Region, California. Dry nitrogen deposition is the i... Bay Area Open Space Council.

56. Inorganic Pollution, 2007-2008

2007. National Center for Ecological Analysis and Synthesis. This raster dataset depicts the measurements of inorganic pollution in the world's oceans. See the Lineage section for complete information regardi... Science.

57. Invasive Species, 2007-2008

2007. National Center for Ecological Analysis and Synthesis. This raster dataset contains measurements of invasive species in the world's oceans. See the Lineage section for complete information regarding dat... Science.

58. LandScan 2007 Global Population Database

2007. Oak Ridge National Laboratory. The LandScan 2007 global population dataset is a worldwide population database compiled on a 30" X 30" latitude/longitude grid. Census counts (at s... Oak Ridge National Laboratory.

59. Nutrient Input, 2007-2008

2007. National Center for Ecological Analysis and Synthesis. This raster dataset contains measurements of nutrient (fertilizer) pollution in the world's oceans. See the Lineage section for complete informatio... Science.

60. Ocean Acidification, 2007-2008

2007. National Center for Ecological Analysis and Synthesis. This raster dataset depicts the measurements of ocean acidification at global coverage. Changes in CO2 concentration alter the aragonite saturation... Science.