地理信息系统在土地多宜性评价中的应用

Application of GIS to Land Multisuitability Evaluation

土地多宜性评价为土地利用规划和决策提供多种可能利用方式的信息，它是对每一种不同的利用方式，就选择一套相应的评价标准，它选择的评价对象多，评价的结果准确度高。本文在地理信息系统（GIS）的帮助下，建立了土地空间位置图件数据库、土地属性数据库、作物生长要求生理生态知识库和评价指标模型库，对徐水县6种作物进行了多宜性评价的探索。结果显示:在计算机和GIS的帮助下，土地评价的工作效率和定量化水平的显著提高，6种作物多宜性评价的结果有较强的应用价值。

Land multisuitability evaluation provides the information of more land uses, it chooses corresponding evaluating standards according to different land use types, so the results of land evaluation are of high quality. The authors set up a set of databases as land spatial database, land attributive database, the knowledge base of crops' growth, physiological and ecologica1 demands and the mathematical model base of evaluation index. The method of land multisuitability evaluation is given and tested in 6 crops in xushui county. The result showed that, with computer and GIS assist, the evaluation work could be more effiencent and accurate, and 6 crops' multisuitability evaluation could increase the applicability of land evaluation.