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Carson Farmer has written some new classification functions for QGIS. QGIS 1.5 only has “Equal Interval” and “Quantiles” classification algorithms implemented. Carson added the following algorithms to trunk:

  • Jenks Optimisation (or Natural Breaks)
  • Standard Deviation
  • R’s “Pretty” algorithm
QGIS classification algorithms

QGIS classification algorithms for layer symbology in current QGIS trunk version

Read more on his blog: “Playing around with classification algorithms: Python and QGIS” and “Adding a bit of class(ification) to QGIS…”

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