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File Name Convention
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These data sets are provided at three spatial resolutions of 0.25, 0.50, and  
1.0 degrees lat/long. For each spatial resolution there are eight files
describing the percentage, from 0 to 100, of the following global continuous 
fields:

1) Bare cover
2) Herbaceous cover 
3) Tree cover
4) Water 
5) Deciduous tree cover
6) Evergreen tree cover
7) Broadleaf tree cover
8) Needleleaf tree cover

The files for 1) are called bare_percent_xx.asc, where xx is qd, hd, or 1d, 
denoting a spatial resolution of 1/4, 1/2 or 1degree, respectively. The files 
for 2) are called herb_percent_xx.asc, with xx as above, and so on for the 
different continuous fields.

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ASCII File Format
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All of the files in the ISLSCP Initiative II data collection are in the ASCII, 
or text format. The file format consists of numerical fields of varying length, 
which are delimited by a single space and arranged in columns and rows. All 
values in these files are written as real numbers. A value of -999 is used to 
indicate cells with no data. 

The files at different spatial resolutions each contain the following numbers of 
column and rows:
  One degree: 360 columns by 180 rows 
  1/2 degree: 720 columns by 360 rows 
  1/4 degree: 1440 columns by 720 rows 

All files are gridded to a common equal-angle lat/long grid, where the coordinates
of the upper left corner of the files are located at 180 degrees W, 90 degrees N and 
the lower right corner coordinates are located at 180 degrees E, 90 degrees S. Data 
in the files are ordered from North to South and from West to East beginning at 180  
degrees West and 90 degrees North.