Data sets
A major goal of our research group is to develop an improved understanding of human land use activities at continental to global scales. Consequently, we have been developing maps and datasets describing contemporary and historical global land use practices. You may freely download our data sets here, for non-commerical use.

Some data sets were developed earlier, during Navin Ramankutty's tenure at SAGE, at the University of Wisconsin. For those earlier data sets, please visit the SAGE website (http://www.sage.wisc.edu/pages/datamodels.html).
This is a beta release of an updated version of our original historical cropland data set that spanned the 1700-1992 period. The original data set was described in the publication by Ramankutty and Foley (1999) in Global Biogeochemical Cycles. This release updates the data to the 1700-2007 time period, and additionally includes pastures. This is a complete revision of the data, and not just a simple update of the last 15 years. This is a beta release -- we haven't checked carefully for errors yet, so please use with caution. The data is provided currently in NetCDF format at 0.5 degree resolution in latitude by longitude, and annual timescale. 5min resolution data as well as data in other formats will become available later.
Described in the publication, Potter et al. (2010), "Characterizing the Spatial Patterns of Global Fertilizer Application and Manure Production", Earth Interactions, 14, 2010. The data are provided in NetCDF and ArcGIS ASCII format at 0.5 deg resolution in latitude by longitude.
Described in the publication, Monfreda et al. (2008), "Farming the planet: 2. Geographic distribution of crop areas, yields, physiological types, and net primary production in the year 2000", Global Biogeochemical Cycles, Vol.22, GB1022, doi:10.1029/2007GB002947. The data is provided in NetCDF and ArcGIS ASCII format at 5 minute resolution in latitude by longitude. The NetCDF files have 4 levels (ArcGIS files only have the 1st two levels; contact authors if you want the other two levels), as follows: Level 1 = Harvested Area (unit = proportion of grid cell area). Note that values can be greater than 1.0 because of multiple cropping. Level 2 = Yield (unit = tons per ha). Levels 3 and 4 = Administrative levels from which the source data in levels 1 and 2 come from respectively. In levels 3 and 4, a value of 1 = county; .75 = state; .5 = interpolated from within 2 degrees lat/long; .25 = country; 0 = missing
Described in the publication, Ramankutty et al. (2008), "Farming the planet: 1. Geographic distribution of global agricultural lands in the year 2000", Global Biogeochemical Cycles, Vol. 22, GB1003, doi:10.1029/2007GB002952. The data is provided in two formats – NetCDF and ArcINFO ASCII – at 5 minute resolution in latitude by longitude.
Described in the publication, Ramankutty et al. (forthcoming), Annals of American Association of Geography
Described in the publication, Ramankutty (2004), "Croplands in West Africa: A Geographically-explicit Data Set For Use in Models", Earth Interactions, 8, 1-22. The data is provided in two formats – NetCDF and ArcINFO ASCII – at 5 minute resolution in latitude by longitude.