Skip to main content

FRAMES logo
Resource Catalog

Document

Type: Conference Proceedings
Author(s): Marielle Jappiot; Sebastien Sauer; Nathalie Alibert; Christophe Philibert-Caillat
Editor(s): Domingos Xavier Viegas
Publication Date: 2002

In the context of forest fire prevention, the Cemagref in Aix-en-Provence is developing, with teledetection tools, a method of spatial analysis in cartography and characterization of the interfaces between natural spaces and spaces that have been altered man (particularly sensitive zones). The aim of this study is to group zones having similar profiles with regard to fire risk exposure. A first automatic classification, using orthophotos of the community of Auriol in the Marseilles region, enabled to separate objects at risk (buildings, vegetation). The notion of texture was then introduced thanks to the CLAPAS module (an extension of Arcview) in order to numerically retranscribe the spatial arrangement of the pixels around a central pixel. The automatic classification enabled to reduce the number of shades in the image while retaining its textural information, but certain confusions were noted between natural (rock) and artificial mineral (rooftops) surfaces. The CLAPAS contextual analysis enabled to isolate the types of habitats, but the spatial resolution had to be changed to reduce the dimension of the image. This distinction was validated by landscaped indexes calculated on the image or a part of the image. An interface typology was finally proposed. The CLAPAS module is easy to use and gives good results. Moreover, it is easily available on the market. However, a certain degree of confusion remains in the characterisation of interfaces despite the large amount of treatments carried out. The use of teledetection and cartography software packages has enabled to individualize the interfaces between habitats and forest zones. However, other forms of image treatment should be pursued to make the methodology more efficient by improving the separation of objects.

Online Links
Citation: Jappiot, Marielle; Sauer, Sebastien; Alibert, Nathalie; Philibert-Caillat, Christophe. 2002. Wildland/urban interfaces and fire risk - an automatic mapping. In: Viegas, D. X., editor. Forest Fire Research and Wildland Fire Safety: Proceedings of IV International Conference on Forest Fire Research 2002 Wildland Fire Safety Summit, Luso, Coimbra, Portugal, 18-23 November 2002. Rotterdam, Netherlands: Millpress.

Cataloging Information

Regions:
Keywords:
  • classification
  • fire risk
  • France
  • orthophoto
  • teledetection
Record Last Modified:
Record Maintained By: FRAMES Staff (https://www.frames.gov/contact)
FRAMES Record Number: 15143