file format : GeoTIFF File Format
file title  : glwd31
last update : 30-March-2010
producer    : T. Hengl
lineage     : http://spatial-analyst.net/scripts/getGLWD.R
data type   : Byte
file type   : ASCII
columns     : 7200
rows        : 3600
meas. scale : factor
description : Global Lakes and Wetlands
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  : 0
max. value  : 12
display min : 1
display max : 12
value units : factor
value error : unspecified
flag value  : -1
flag def'n  : unavailable data
src. Eng    : Global Lakes and Wetlands v3.1
src. URL    : http://www.worldwildlife.org/science/data/item1877.html
src. scale  : 1000 m
src. refs   : Lehner, B., Doll, P., 2004. Development and validation of a global database of lakes, reservoirs and wetlands. Journal of Hydrology 296(1-4):1-22.
src. date   : 2003
src. owner  : WWF (GLWD is available for non-commercial scientific, conservation, and educational purposes)
legend cats : 13
Cat       0 : other classes
Cat       1 : Lake           
Cat       2 : Reservoir      
Cat       3 : River          
Cat       4 : Freshwater Marsh, Floodplain
Cat       5 : Swamp Forest, Flooded Forest
Cat       6 : Coastal Wetland
Cat       7 : Pan, Brackish/Saline Wetland
Cat       8 : Bog, Fen, Mire (Peatland)
Cat       9 : Intermittent Wetland/Lake
Cat      10 : 50-100% Wetland
Cat      11 : 25-50% Wetland 
Cat      12 : Wetland Complex (0-25% Wetland)