本文首先对遥感数据进行了统计分析,实现了最小亏损意义下的水陆决断;为从水陆分界线中区分出湖滨、河边与海岸,采用了空间鉴别技术对河口以及河口内外进行识别。为了实现遥感数据在小通道容量下的实时信息传递或节约贮存空间,文中介绍了由计算机对岸线进行链式编码,并在此基础上实现岸线的自动量长。 In this paper, firstly, the statistical analysis of remote sensing data was carried out to realize the water-land decision in the sense of minimum loss. In order to distinguish the lakeside, riverside and coast from the boundary between water and land, spatial identification technology was used to identify the estuary and estuary. In order to realize real-time information transmission or save storage space of remote sensing data in the small channel capacity, this paper introduces the chain coding by the computer to the shoreline, and on this basis, realizes the automatic length measurement of the shoreline.