摘要
以江苏南通小洋口港外辐射沙脊群海域为研究区,在TM数据地表反射率反演的基础上,通过实测水深数据与TM4波段反射率、TM4/TM2波段反射率比值因子的相关研究,分别建立了线性、对数、指数和幂指数的水深反演模型,研究不同模型对该研究区0～5m、5～10m、10～15m不同水深的适用情况以及水深反演精度分析.研究结果表明：针对本研究区,以TM4/TM2波段反射率比值建立的线性水深反演模型的精度最好,并依据该模型对研究区进行遥感水深制图.
Remote sensing has proved to be a useful technique in measuring water depth in coastal zone. This paper takes offshore sandbanks of Xiaoyangkou harbor in Jiangsu Province as a typical study area. Different models for prediction of water depth have been evolved based on analysis of the TM image and field measurements of the research area. The accuracy of different derived models has been assessed by in situ depth measurements. The water depth of study area was divided into intervals of：0-5m, 5-10m and 10-15m. The exponential model was found to fit the water depth less than 5m, whereas the linear model was found to fit the depth in 5 - 15m. The linear model based on the ratio of TM4 and TM2 proved to be the best one in this study. The bathymetric map of this area has also derived.
出处
《遥感信息》
CSCD
2006年第6期27-30,I0001,共5页
Remote Sensing Information
基金
江苏省地质调查研究院委托项目:"江苏海岸水下地形多尺度遥感成图关键技术研究"
关键词
遥感
水深
TM
海岸带
光谱
remote sensing
bathymetry
coastal zone
TM
spectra
