基于阈值的城镇土地定级距离衰减模型  

A Distance Attenuation Model for Urban Land Classification Based on Threshold

作　　者：樊雅婷[1] 杨建宇[1] 朱德海[1] 王彦集[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京市清华东路17号100083

出　　处：《武汉大学学报（信息科学版）》2008年第3期277-280,共4页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2003AA134040);德州市土地定级估价资助项目

摘　　要：提出了一种新的土地定级距离衰减模型——综合衰减模型。该模型以直线距离衰减模型与最短路径衰减模型为基础,在计算衰减距离时引进了阈值的概念。结合德州市土地定级估价系统对模型进行了实现,结果表明,本文模型与其他模型相比更符合客观实际。A new distance attenuation model for land classification——comprehensive attenuation model was presented in order to improve the accuracy of attenuation distance. Based on the beeline distance attenuation model and the most short-circuit path attenuation model, this model introduces the threshold concept in the course of attenuation distance calculation. Application of threshold to attenuation distance calculation with the different calculation methods chosen according to different situation makes the result of classification more reasonable. The model was realized in the actual project of the land gradation and valuation system development in Dezhou city, The results show that this model accords more with actual situation compared with other models.

关 键 词：土地定级 衰减模型 阂值 最短路径 直线距离 

分 类 号：P273[天文地球—测绘科学与技术]