Methodology
The study area is located in the chiang Mai region in northern Thailand it corresponds to the area covered the multi band Spot scene acquired on Jan 11 1997 and overlaps six map sheets at the scale of 1:50,000.

The five parameters of the Equation were evaluated for the study area using remote sensing ground observation and existing map data the SPOT multi band image was edged enhanced contract stretched and enlarged at the scale of 1:100.000 to be used to map land use land cover and to derive crop management factor and erosion control practice factor.

Existing maps and image interpretation over lays w were digitized and integrated in to the spatial analysis system data base and integrated digital terrain model DTM and satellite image data were electronically transferred from the MERIDIAN image processing system the processing and or interpretation work involved to derive each factor and the final soil erosion susceptibility map are described below.