Geographic Information System Application for Land Suitability Evaluation of Sunflower Plantation

The main objective of this research is to locate suitable areas for sunflower plantation in Chi watershed, Northeast of Thailand on 2011. The author used knowledge-based decision tools or rules to locate suitable areas for economic crops plantation of sunflower by analyzing from physical evaluation of suitable as follows; Soil (S), Land (L), Rainfall (R), Water (W), Saline soil (SA), and Slope (SL).These factor layers were analyzed by using Overlay Function Technique (OFT) including union and intersect scheme. Variables then were determined their score via condition of suit model = S + L + R + W + SA + SL. The results of this work found that areas for sunflower plantation included high, moderate, low and non suitable areas respectively.