Development potential evaluation of reserve resources in the Pearl River Delta farmland

Arable land reserve resources was an important supplementary source of the cultivated land, and it had an important role in the dynamic balance of farmland. Taking the Pearl River Delta as example, cultivated land resource type, quantity, quality and distribution were studied in this paper. Before combining with the actual grade score on evaluation factors, we used the progressive discrimination analysis to screen factors , and then we used the Delphi method and entropy weight method to determine the socioeconomic and natural conditions as well as the weight of the ecological environment factors. Based on GIS technology, and the evaluation of the properties of polygons data, combined with the evaluation system to determine the factor score of each evaluation unit, and then calculate the total score for each evaluation unit exponentially weighted model, the potential level of each unit was determined.