TM影像目视解译显示尺度的选择及尺度效应分析——以内陆河流域绿洲-荒漠过渡带为例  

Choice and Effect Analysis of Displaying Scale of the Visual Interpretation of TM Image:A Case Study on the Ecotones between the Oases and Deserts in the Inland River Basin

作　　者：李秀梅[1] 

机构地区：[1]中国林业科学研究院荒漠化研究所,国家林业局林木培育重点实验室,北京100091

出　　处：《地理与地理信息科学》2012年第4期33-37,共5页Geography and Geo-Information Science

基　　金：国家林业局林业公益性行业科研专项(201104077);中国林业科学研究院中央公益性科研院所基本科研业务费专项资金重点项目(CAFYBB2007008)

摘　　要：选择干旱区对目视解译显示尺度敏感的绿洲—荒漠过渡带的TM影像,应用格局指数法和转移矩阵法,从受显示尺度影响明显的面积和斑块形状特征两方面进行尺度效应分析。将显示尺度划分为3个尺度区间:≥1∶7.5万,数据精确,信息丰富;1∶7.5万～1∶12.5万,尺度效应明显,细节信息大量丢失;≤1∶12.5万,细节信息较少,而形状复杂、面积较大的斑块出现尺度效应。研究结果表明,1∶7.5万是研究绿洲—荒漠过渡带景观的最小适宜尺度。Landscape map, one of the main data forms of landscape ecology obtained by visual interpretation of TM image, is affected by displaying scale in visual interpretation. Adopting optimal displaying scale could minimize data errors in interpretation. This paper takes the ecotones between the oases and deserts, key research region and sensitive to displaying scales, as a case study. Five landscape maps were obtained by visual interpreting TM images at 1 ： 50 000,1 ： 75 000,1 ： 100 000,1 ： 125 000 and 1：150 000 displaying scales. By dividing patch area grades and patch shape grades based on landscape maps, a new patch types system was established. Then landscape indices and transfer matrices were calculated to reflect interpret precision. The results indicated that,the displaying scales were divided to three sections：greater than 1：75 000,between 1：75 000 and 1：125 000 and less than 1 ： 125 000. 1 ： 75 000 with high data precise and abundant information was the appropriate displaying scale for interpreting ecotones between the oases and deserts.

关 键 词：TM影像 目视解译 尺度效应 绿洲—荒漠过渡带 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]