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本文较详细地探讨了以多时相遥感数据为基础开展海岸变迁研究的方法和技术路线。认为:解译海岸线和进行海岸变迁研究首先要统一遥感数据的坐标系统、分辨率并相互配准。解译海岸线应以水陆分界较清楚的彩色合成图像为背景;当各个遥感数据成像时刻的潮位相差较大时,提出了在数字高程模型DEM(Digital Elevation Model)的支持下开展海岸线纠正的方法和影响精度的几个方面。最后讨论了大亚湾区域1973年、1986年、1995年、1997年的海岸特征和4个时相间海岸线变迁的程度及其与海岸类型、人为活动的关系。
This paper discusses in more detail the methods and technical routes for the study of coastal changes based on multi-temporal remote sensing data. It is considered that the study of coastline interpretation and coastal change must firstly unify the coordinate system, resolution and registration of remote sensing data. The interpretation of the coastline should be based on the clearer color composite images of the land and sea boundaries. When the tide levels of remote sensing data differ greatly from each other, a method of coastline correction with the support of Digital Elevation Model (DEM) Affect the accuracy of several aspects. Finally, we discuss the coastal characteristics and the changes of four time-laden coastlines in the Daya Bay region in 1973, 1986, 1995 and 1997 and their relationship with the types of coasts and human activities.