基于GIS的江汉平原湖区农业用地适宜性评价

土地适宜性评价是土地资源规划与管理的重要内容，是确定合理的土地利用方式的前提，在地理信息系统（ＧＩＳ）应用中，土地适宜性评价主要是通过对土地的评分来确定其相对于某种用途的适宜程度，其过程一般包括选取评价因素，单因素评价，多因素乘权叠加即多因素综合评价。相对于传统的纯数值评价方法，基于ＧＩＳ的土地适宜性评价方法将数值计算和图形处理有机地结合起来，具有简洁，直观，易操作和快速等特点。运用ＧＩＳ工具，对

Study on the GIS-based agricultural land suitability evaluation in Jianhan plain-lake district

Land suitability evaluation, as a prerequisite in determining rational ways of land use, is very important in land resources planning and management. With the emerging and development of geographical information system (GIS), it becomes one of the important application fields of GIS. In GIS applications, grading by score is mainly used to determine the suitability level of a land against some kinds of usage. Its implementation includes three steps: (1) selection of evaluation factor; (2) evaluation of single factor; and (3) comprehensive evaluation of multi factors. Compared with traditional method by use of pure quantity, land suitability evaluation based on GIS may integrate the numeral calculation with graphical procession effectively, so as to raise the evaluation efficiency. This paper presents the case of agricultural land suitability evaluation in Jianli County by the use of GIS. It is shown that GIS can support the evaluation process effectively.