摘要
针对海岸线现场测量难度大、施测周期长等问题,研究了应用高分辨率卫星遥感影像和DEM数据提取海岸线的技术方法。以SPOT 5融合影像为例,给出了基岩、砾石、砂质、人工4种类型海岸线的解译标志建立方法和提取原则,其中砂质岸线的提取须对影像做拉伸处理;针对纯遥感手段提取海岸线的不足,提出结合精细DEM数据提取海岸线的几种方式,分析了基于砂质岸线解译标志提取海岸线高程精度的可靠性,并给出了结合DEM数据提取基岩岸线的应用实例。通过应用海岸线现场测量结果开展精度验证,海岸线提取结果的定位精度优于5m,可满足1∶10 000比例尺的制图精度要求。
The field measurement of coastline has much difficulty and a long measurement cycle,so it is not suitable for normal investigation.In view of this,we studied the method of coastline extraction using satellite remote sensing image with high resolution and DEM.Taking SPOT 5 image as an example,we gave the establishment method of interpreting marks and extraction principle for rocky,gravelly,sandy and artificial coastline.Especially for the sandy area,the image should be stretched before coastline extraction.With regard to the shortages of coastline extraction by remote sensing only,we put forward several ways that combined with fine DEM data,analyzed the reliability of elevation obtained from sandy coastline based on interpreting marks,and then gave the instances of extracting rocky coastline.Finally,comparied with the field measurement result,the positioning accuracy of the extracted coastline is better than 5 m,which can meet the requirement of mapping accuracy for 10 000 scale.
出处
《遥感技术与应用》
CSCD
北大核心
2011年第5期613-618,共6页
Remote Sensing Technology and Application
基金
国家863计划项目(2009AA121403)
国家自然科学基金青年基金(40906094)
中国石油大学(华东)自主创新科研计划项目资助
关键词
海岸线提取
遥感
DEM
Coastline extraction
Remote sensing
DEM
