江苏近海辐射沙洲水域水深与光谱的相关性研究
杜心栋, 田庆久, 王晶晶, 王向成
南京大学国际地球系统科学研究所,南京210093
THE CORRELATION BETWEEN WATER DEPTH AND
REFLECTANCE SPECTRA IN RADIAL SUBMARINE
SAND RIDGE SYSTEMS OF JIANGSU PROVINCE
DU Xin-Dong, TIAN Qing-Jiu, WANG Jing-Jing, WANG Xiang-Cheng
International Institute for Earth Science, Nanjing University, Nanjing 210093
摘要 通过对实测光谱数据和水深数据的分析研究发现,泥沙浓度在水深遥感中具有重要意义。泥沙含量决定水体光谱反射率与
水深的相关性方向: 泥沙含量较少的清水区,光谱反射率与水深呈负线性相关; 而在泥沙含量较高的浊水区,光谱反射率与水深
数据呈正线性相关。以此为依据,对水体进行清/浊水体的光谱分别处理,可提高水深的光谱反演精度。同时,结合实测水体光谱
进行不同光谱分辨率的模拟分析,发现高光谱分辨率遥感将有助于提高水深反演精度。
关键词 :
遥感图像 ,
几何纠正 ,
快速算法 ,
微机
Abstract : Sand drift is of vital importance in water-depth remote sensing, as shown by an analysis of the
reflectance spectral data and measured water depth data. The concentration of the sand drift decides the direction
of the correlation coefficient between the water depth and the reflectance spectra: the correlation coefficient is
lower than 0 in the clear area and higher than 0 in the high turbidity area. On such a basis, the water body can
be classified before depth extraction so as to improve the depth extraction precision. The high spectral remote
sensing technique can raise the extraction precision based on the simulation analysis of different spectra.
Key words :
remote sensing image
geometric rectification
fast algorithm
personal computer
收稿日期: 2007-03-05
出版日期: 2009-07-21
基金资助: 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”。
通讯作者:
杜心栋(1981-),男,南京大学硕士研究生,主要研究方向为资源环境遥感。
引用本文:
杜心栋, 田庆久, 王晶晶, 王向成. 江苏近海辐射沙洲水域水深与光谱的相关性研究[J]. 国土资源遥感, 2007, 19(3): 89-93.
DU Xin-Dong, TIAN Qing-Jiu, WANG Jing-Jing, WANG Xiang-Cheng. THE CORRELATION BETWEEN WATER DEPTH AND
REFLECTANCE SPECTRA IN RADIAL SUBMARINE
SAND RIDGE SYSTEMS OF JIANGSU PROVINCE. REMOTE SENSING FOR LAND & RESOURCES, 2007, 19(3): 89-93.
链接本文:
https://www.gtzyyg.com/CN/10.6046/gtzyyg.2007.03.21
或
https://www.gtzyyg.com/CN/Y2007/V19/I3/89
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