1850. Harvard Map Collection, Harvard College Library, Harvard University. Library. Open Collections Program, Burr, David H., 1803-1875., and Haven, John. This layer is a georeferenced raster image of the historic paper map entitled: The world, on Mercator's projection, by David H. Burr. It was publis... Harvard Map Collection, Harvard College Library.
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1853. Harvard Map Collection, Harvard College Library, Harvard University. Library. Open Collections Program, Vuillemin, A. (Alexandre), b. 1812., Langevin., and Fatout. This layer is a georeferenced raster image of the historic paper map entitled: Planisphere : elementaire et illustre indiquant la description geogr... Harvard Map Collection, Harvard College Library.
1882. Harvard Map Collection, Harvard College Library, Harvard University. Library. Open Collections Program, Bruno e Salomone., and Palumbo, G. This layer is a georeferenced raster image of the historic paper map entitled: Viaggio della R[a] Corvetta 'Vettor Pisani', negli anni 1882-1883-18... Harvard Map Collection, Harvard College Library.
2009. International Steering Committee for Global Mapping (ISCGM). Percent Tree Cover is a raster theme representing the percentage of tree cover throughout the world at a resolution of 30 arc seconds. This layer i... International Steering Committee for Global Mapping (ISCGM).
2000. University of Minnesota. Institute on the Environment. This raster dataset represents the average yield for yam crops in tons per hectare. Croplands cover ~15 million km2 of the planet and provide the b... University of Minnesota. Institute on the Environment.
2000. University of Minnesota. Institute on the Environment. This raster dataset represents the agricultural census data quality for yam crop yields. Data quality categories include (0= missing, 0.25= county ... University of Minnesota. Institute on the Environment.
2000. University of Minnesota. Institute on the Environment. This raster dataset represents the agricultural census data quality for harvested areas of yam crops. Data quality categories include (0= missing, ... University of Minnesota. Institute on the Environment.
2000. University of Minnesota. Institute on the Environment. This raster dataset depicts the average fractional proportion of a gridcell for yam crops that were harvested circa 2000. Croplands cover ~15 milli... University of Minnesota. Institute on the Environment.
2000. University of Minnesota. Institute on the Environment. This raster dataset depicts the average number of hectares per land-area of a gridcell for yam crops. Data quality categories include (0= missing, ... University of Minnesota. Institute on the Environment.
2000. University of Minnesota. Institute on the Environment. This raster dataset represents total yam crop production in metric tons. Harvested area in hectares was multiplied by yield per hectare to create t... University of Minnesota. Institute on the Environment.