首先介紹了基于GIS的傳統的土地適宜性分析模型(TLSAM)，并指出它有兩個主要缺點:一是同一級別內的不同類別沒有顯示出評分的差別;二是不同級別的分界處評分差別過分拉大.然后采用了可信度(Certainty Degre)概念對其進行了改進.研究表明，經過改進后的土地適宜性分析模型(ISAM)包含的信息更豐富、更準確，能
為決策者和土地管理部門提供更多的選擇機會.
關鍵詞:地理信息系統，綠地系統，土地適宜,信度

Abstract:This paper introduces the traditional land suitability analysis model (TLSAM)，which has two main disadvantages:one is that no diference is identified among the diferent subclasses within the same class; the other is that the diference between the two diferent classes is exaggerated around the division of scores. Then it wants to improve this traditional land suitability analysis model by using the idea of certainty degree(CD).Research showed that the improved land suitability analysis model (ILSAM) encompasses more enriched and precise information than the traditional one, thereby providing more options for the decision makers and land managers.
Key words:geographic information system (GIS);green space system; land suitability analysis model; credibilit