The Application of fuzzy logic and GIS : a case study for the evaluation of tourist accommodation area in Sukhothai province

Abstract

To evaluate the different between apply the fuzzy sets and crisp set which normally use with Geographic Information System to evaluate site suitability for tourist accommodation development in Sukhothai province. This evaluation divided in two main parts. The first part evaluate different between applied fuzzy logic and normal crisp set to evaluate physical environment potential area for tourist accommodation development. Criteria to concerned when evaluated physical environment suitability included soil erosion, runoff, groundwater contamination, slope and flood risk. This study has set up 14 criteria to verified the classification range to study effects when applying fuzzy set and crisp set. It found that when data are multimode, such as soil erosion and runoff, varying data range will provide similar results between crisp and fuzzy approaches. When data are single mode, e.g. groundwater depth, groundwater volume and slope, will get different results when vary the range. The second part evaluated effects of fuzzy and crisp sets when applied different weightings. Concerning factor about physical environment factor, regulation constraint, water supply and infrastructure support for tourist accommodation. The weighting and rating suitability were categorized into 11 scenarios. This study founded that when apply large weight with crisp set, factor which contained large weight will interfere others factor which contain smaller weight. Different from fuzzy set factor which contain high weight have quite effect with other lower factors.