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Conference Proceeding

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Weights of Evidence (WofE) spatial analysis was used to predict probability of southern pine beetle (Dendroctonus frontalis) (SPB) infestation in Angelina, Nacogdoches, San Augustine and Shelby Co., TX. Thematic data derived from Landsat imagery (1974–2002 Landsat 1–7) were used. Data layers included: forest covertype, forest age, forest patch size and percent slope. WofE predicted infestation probabilities were signifi cantly higher at infestation locations, versus random locations (p<0.0001). Signifi cantly more infestations occurred in the higher probability areas (p=0.002). Infestation size was not signifi cantly correlated with probability (p=0.0528). Correlations were found between WofE probability and traditional SPB hazard rating, calculated from forest inventory data, using the Mason (1981) system (p<0.0001). WofE probability maps were used to produce current SPB three and fi ve-class hazard rating maps for the study area. WofE was effective for predicting SPB hazard, utilizing existing, remotely-sensed data sets.


Grogan, J. B.; Kulhavy, D. L.; Kroll, J. C. 2010. Southern pine beetle infestation probability mapping using weights of evidence analysis, pp 319-324. In: Stanturf, John A., ed. 2010. Proceedings of the 14th biennial southern silvicultural research conference. Gen. Tech. Rep. SRS–121. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station.



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