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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.
1842. Rumsey, David, 1944- and Arrowsmith, John, 1790-1873. This layer is a georeferenced image of a map of Northwest Africa originally created by J. Arrowsmith in 1842. The original map appears in 'The Lond... Cartography Associates.
1799. Rumsey, David, 1944- and Faden, William, 1749-1836. This layer is a georeferenced image of a map of Switzerland created in 1799. The original map appears in '(General atlas. 1811).' The historic map ... Cartography Associates.
2000. This raster dataset represents the average yield for nutmeg crops in tons per hectare. Croplands cover ~15 million km2 of the planet and provide th... University of Minnesota. Institute on the Environment.
2000. This raster dataset represents the agricultural census data quality for nutmeg crop yields. Data quality categories include (0= missing, 0.25= coun... University of Minnesota. Institute on the Environment.
2000. This raster dataset represents the agricultural census data quality for harvested areas of nutmeg crops. Data quality categories include (0= missin... University of Minnesota. Institute on the Environment.
2000. This raster dataset depicts the average fractional proportion of a gridcell for nutmeg crops that were harvested circa 2000. Croplands cover ~15 mi... University of Minnesota. Institute on the Environment.
2000. This raster dataset depicts the average number of hectares per land-area of a gridcell for nutmeg crops. Data quality categories include (0= missin... University of Minnesota. Institute on the Environment.
2000. This raster dataset represents total nutmeg crop production in metric tons. Harvested area in hectares was multiplied by yield per hectare to creat... University of Minnesota. Institute on the Environment.
2007 and 2008. 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.