摘要
利用多元统计方法中的因子分析法 ,对我国西部地区县市级行政区的土地利用程度进行了综合评价。基于评价单元的含有结构性映射的综合得分值 ,以中国生态地理区域系统为宏观控制性框架 ,利用GIS技术对评价单元进行了归并 ,从而尝试了自上而下和自下而上区划方法的结合。研究结果将西部 12个省、自治区和直辖市的所有县市级行政区归并成东部季风区、西北干旱区和青藏高寒区 3个大区及 30个小区。
Integrated evaluation on land use degree for each county in western China was made by using factor analysis. Based on the integrated score of each evaluated unit (county or county-level city), which reflected the structure of land use, and taken the eco-geographical system of China as a controlling framework, evaluated units were united with the GIS technique; thus, the combined division method of From-top-to-bottom (TB) and From-bottom-to-top (BT) was tested. Western China, which included 12 provinces, autonomous regions and municipality, were divided into three large regions of East monsoon region, Northwest arid region and Tibetan alpine region and further divided into 30 subregions. The various types of indices commonlyused to illuminateland use degreejust reflect the situation of land usefrom a few on the sides. Therefore, the simply using of these indicesto proceed mathematical analyses and to dodivision research would usually deviate from the right direction. Taken the eco-geographical system of China as a controlling framework, the combined division method of TB and BT can be used with hierarchical structure and suggestivedirection. Using the factor analysis, information provided by many indices can be purified and synthesized. The result of data deduction also keeps the structure of samples in high dimension, especiallythe structure related to ordering. Thus, the comparisonand union of the evaluated units have one directly referenced index rather than lots of indices. The application of GIS technique makes the orderingof integrated score closely related to the space attributes among samples, and avoid the irrational union of evaluated units which have almost the same integrated score but have very different land use structure. Also the GIS technique makes the division methods combined between that of TB and that of BT. Many attributes of the divided regions are gradually changing;therefore, the result of division is opposite. County boundary must be consideredfor maneuverability; however, some countieshave large areas, resulting in rather differentecogeographic conditions. With more detailed inquisition information about land use and perfecting study method, the division result would be more reasonable.
出处
《地理研究》
CSCD
北大核心
2001年第6期731-738,共8页
Geographical Research
基金
国土资源部重点项目 (2 0 0 0 30 1)
中国科学院地理科学与资源研究所知识创新工程领域前沿项目(CXIOG -E 0 1- 0 1)
国土资源部 2 0 0 0年科技专项计划 (2 0 0 0 10 30 3)资助
