摘要
以甘肃省张掖市农田保护区为例,在比较分析多时相影像叠合方法、图像代数变化检测算法、多时相图像主成份分析法和分类后比较法等几种目前常用的变化检测方法的基础上,提出重点农田保护遥感动态监测的一般思路和方法,并利用ERDAS系统中的空间建模工具,建立起基于图像代数变化检测算法--差值法的动态遥感变化检测模型。实验表明该模型用于检测耕地的变化简单且有效,能够满足重点农田保护动态监测精度的基本要求,对遥感技术在农田保护动态监测中的应用有着一定的现实意义。
Taking a piece of the farmland in Zhangye city of Gansu province as a case, and using digital satellite remote sensing TM and CBERS data, the thinking and methods of change detection are explored. Based on comparing and analyzing some change detection algorithms often-used currently, the new model is built by using the tool of space model maker in the system of ERDAS. The experiment shows that the model is simple and effective for using change detection of farmland. The study of this essay has the important practical significance to the application of remote sensing technique on dynamic monitoring for farmland protection.
出处
《地理空间信息》
2008年第2期49-52,共4页
Geospatial Information
关键词
遥感
农田保护动态监测
空间建模
remote sensing
dynamic monitoring for farmland protection
space model making
