file format : GeoTIFF File Format
file title  : gaccessm
last update : 30-March-2010
producer    : T. Hengl
lineage     : http://spatial-analyst.net/scripts/getGlobio.R
data type   : Int32
file type   : GTiff
columns     : 7200
rows        : 3600
meas. scale : Numeric
description : Estimated travel time to major cities (>50k) in hours
proj4string : +proj=longlat +ellps=WGS84
ref. system : geographic
ref. units  : arcdegrees
unit dist.  : 1
min. X      : -180
max. X      : 180
min. Y      : -90
max. Y      : 90
pos'n error : 1000
resolution  : 0.05
min. value  : 1
max. value  : 57518
display min : 1
display max : 57518
value units : travel time in hours
value error : unspecified
flag value  : 0
flag def'n  : unavailable data
src. Eng    : A global map of Accessibility
src. URL    : http://bioval.jrc.ec.europa.eu/products/gam/
src. scale  : 1 km
src. refs   : Nelson, A., 2008. Travel time to the nearest city of 50,000 or more people in year 2000. Global Environment Monitoring Unit - Joint Research Centre of the European Commission, Ispra, Italy. 
src. date   : 2008
src. owner  : European Communities (reproduction is authorized (except for commercial purposes) provided that the source is acknowledged)
legend cats : 0