7th Workshop on Forest Fire Management - EARSeL, European ...

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IV - BURNED LAND MAPPING, FIRE SEVERITY DETERMINATION, AND VEGETATION RECOVERY ASSESSMENT
face is detected in 2002 (36.07 ha) only in the crop (74%) and grass/shrub
(26%) classes. In this park burned area is also detected in pastureland
(data not shown in the histograms) although it is only 3% of the five-year
total (1157.55 ha). This type of information can be very useful for the
assessment of land cover changes driven by fires especially when they
affect natural resources such as protected forests.
Accuracy assessment showed that on average the overall accuracy of ASTER
scene classification is better than 90% and omission and commission errors
are about 50% and 15%; low commission errors highlight that classification
is conservative with few false alarms. These figures quantify the average
scene accuracy and not the accuracy of the annual burned area maps
obtained by summing burned perimeters.
Since our results can be of interest for scientific groups working on fire
monitoring, we distribute burned area maps through a Web Map Server
(WMS) (URL: http://geoportal.irea.cnr.it:8080/geoportal/local_it.jsp) created
at CNR-IREA premises for purposes of the European Project IDE-
Univers (www.ideunivers.eu). These burned areas perimeters are also available
through the “Portale Cartografico Nazionale” (URL: http://www.pcn.
minambiente.it/PCN/progetto_incendi.htm) of the Italian Ministry of the
Environment.
4 - Conclusions
In this work we built a geographic database of burned area perimeters for
Italian National Parks derived from ASTER and SPOT satellite images
between 2001 and 2005. Accuracy measures highlighted the conservative
character of the classifications with a low rate of false alarms (average
scene commission error is less than 15%).
References
Brivio, P.A., Petrucci, B., Boschetti, M., Carrara, P., Pepe, M., Rampini, A.,
Stroppiana, D., Zaffaroni, P., 2009. A multi-year geographic database of
fire affected area derives from satellite images in the National Parks of
Italy. Italian Journal of Remote Sensing, Vol 41, n. 2.
Congalton, R.G., 1991. A review of assessing the accuracy of classifications
of remotely sensed data. Remote Sensing of Environment, 37, 35-46.
Paganini, M., Arino, O., Benvenuti, M., Cristaldi, M., Bordin, M., Coretti, C.,
Musone, A., 2003. ITALSCAR, a regional burned forest mapping demonstration
project in Italy. International Geoscience and Remote Sensing
Symposium, 2003. IGARSS ‘03. Proc. 2003 IEEE Volume 2, 21-25 July
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Piccoli D., Cattoi M., 2004. I rilievi delle aree percorse dal fuoco effettuati
dal Corpo Forestale dello Stato per le attività di polizia giudiziaria.