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).
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. (forthcoming), Earth Interactions. The
data is provided in two formats – NetCDF and ArcINFO ASCII
– at 0.5 degree 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.