[Thuban-list] visual classifier

Perkin, Kym (PLNSA) Perkin.Kym at saugov.sa.gov.au
Thu May 6 09:51:43 CEST 2004

I noticed a post on Thuban-list where you stated you had an article 
Just for completeness or if some problems arise from using the fortran code:
The original paper on natural breaks ("Jenks  optimization") is "Error on
Choroplethic Maps: Definitions,  Measurement, Reduction", G. F. Jenks & F.
C. Caspall, Annals of the  Association of American Geographers 61 (2), pp.
217-244 (1971) 

Yes I would be interested in that article if you could email

I would also be interested in the Fortran code version for Jenks-Caspell
algortithm too if that is able to be released.


GIS Specialist

ph    :  8303 0802
fx     :  8303 0716
email: perkin.kym at saugov.sa.gov.au

Government of South Australia
Department of Transport and Urban Planning
  Spatial Analysis and Research Branch
  136 North Tce
  Adelaide  5000
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