The Regional Influencial Model of Wir elike Geo- object and Case Study in Compr ehensive Evaluation
线状地物的区域影响模型及其 在综合评价中的应用

In geography study,wirelike geo-objects often have basic influence on regional characteristics,such as fault affecting regional crustal stability,traffic line affecting regional social and economic activity,and etc.But in the process of regional comprehensive assessment,the study of influences of wirelike geo-object currently uses approximate assessment methods,such as setting fixed affecting width or simply making off high,middle and low affecting areas,and etc.And the produce of assessment is inefficient.By analysis,the regional influence of wirelike geo-objects has common characteristics such as: distance attenuation,class effect,congregate effect and direction effect,etc.And the basic feature of field includes spatial construction and feature domain,continuity and differentiability,istropic and anisotropic,self-mutuality,and etc.In contrast to wirelike geo-object influence and field model,the result shows that the distribution of wirelike geo-object influence belongs to 2-D field model and using the feature of field can adequately reflect the characteristic of wirelike geo-object to region.Therefore,we suggest taking the model of regional influence field to imitate wirelike geo-object influence for region.And by using of GIS to form regional influence field of wirelike geo-object,the results show that regional influence field can preferable reflect the degree of wirelike geo-object affected field and is applicable to express the regional influence of wirelike geo-object.