preview

IFN4 Database Paper

Decent Essays

We used a database of 26,838 wildfire reports obtained from the Rural Affairs Department of the Regional Government (Xunta de Galicia), and the Spanish Ministry of Agriculture, Food and Environment (MAGRAMA) from the period January 1, 2006 to December 31, 2011. Forest fire reports list general information including location, date, and causes and motivations. Only fires affecting wildland vegetation are included in this database. We evaluated the coordinates of fire ignition points by checking the agreement between those coordinates and the parish and municipality given in fire reports, using topographic maps (National Topographic Map Series, IGN, scale 1:25,000) and the burned areas as visually identified in Landsat 5 TM images taken in different …show more content…

We determined the LULC type using information from the Fourth National Forest Inventory (IFN4, MAGRAMA 2011), regrouping the original IFN4 classes into a total of 11 classes (see Table 2), using information on the cover of trees, shrubs and herbs (grasses and forbs) and the identity of the three dominant tree species and their relative dominance, as provided in the IFN4. Areas with no or very scarce vegetation (e.g., water bodies, beaches, or artificial surfaces such as industrial or urban areas) were excluded, as well as the less frequent LULCs (grasslands, Mediterranean forests and Acacia woods), due to the low number of fires in WUI in these categories. Topographic variables were calculated using the Spatial Analyst extension to ArcGIS® 10.2.2 by ESRI to derive the slope, elevation and aspect, based on a 10 m spatial resolution digital elevation model (DEM, 1:5,000 scale), developed by SITGA (Galician Territorial Information System). The slope was defined as a percentage and elevation in meters. Aspect was defined as the compass direction that the slope faces: N (315º to 360º and 0º to 45º), W (45º to 135º), S (135º to 225º) or E (225º to 315º)

Get Access