信息复合的目的，在于充分利用各种遥感信息资料，实现对各种信息数据的更新补充以及动态分析研究。
The aim of information combination is to make full use of all kinds of remote sensing information and achieve data updating, supplementing and dynamically analysis.
遥感图像为地理信息系统数据的更新和应用提供了有利条件，遥感图像的特征提取是其中的关键问题。
Remote sensing image provides the condition for Updates and application of GIS and edge extraction is important in the process.
湖南省国土资源遥感综合调查信息系统是一个数据可动态更新的运行系统。
Information system of remote sensing integrated survey about land resources in Hunan province is an operable system in which data can be updated dynamically.
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