The updated Readme.txt has more information:
NAME
Countless Calculate DBF Conversion Utility
Version 0.6 - 01.12.2009
CONTACT
Ragnvald Larsen: ragnvald@mindland.com
FILE
lonlat2qdgc.exe
INSTALL
This is a compiled Python 2.5 program. To run it you are
advised to place the file lonlat2qdgc.exe in a separate
folder. C:\bin\lonlat2qdgc\ would be swell. Then open
the command line tool in windows and run the file
according to the SYNTAX below.
DESCRIPTION
The program accepts a .dbf file as input and modifies the
contents of the file. LON and LAT column values are used
to generate a QDGC string on a level determined by the
users input.
Read more here:
http://www.qdgc.org
No warranties. Use at own risk. Do not use on your original
files without having a backup.
REFERENCE
R. Larsen, T. Holmern, S. D. Prager, H. Maliti and E.
Røskaft (2009) Using the extended quarter degree grid
cell system to unify mapping and sharing of biodiversity
data, African Journal of Ecology. Volume 47, Issue 3 ,
Pages 382 - 392
Read more on QDGC levels at Wikipedia:
http://en.wikipedia.org/wiki/QDGC
SYNTAX
lonlat2qdgc [drive:][path][filename] [QDGC level]
[drive:][path][filename] input .dbf-file to be calculated
[QDGC level] Quarter Degree Grid Cell level
to be calculated.
The input .dbf-file should have the following columns:
LON - FLOAT
LAT - FLOAT
QDGC - STRING
Any values in the QDGC column will be overwritten with the
new QDGC value.