南沙群岛海域浅海水深提取及影像海图制作技术

研究了南沙群岛海域 Ｔ Ｍ 图像提取浅海水深的模型和方法以及影像海图制作技术。在传统的多波段线性回归模型的基础上，引入数据分组平均预处理、潮汐改正、分段线性回归和数据归一化等技术，使改进后的模型更加合理并具有较高的精度，从而适用于大的海域。在此基础上，提出了一整套遥感影像海图制作的技术和工艺流程。

SHALLOW WATER DEPTH EXTRACTION AND CHART PRODUCTION FROM TM IMAGES IN NANSHA ISLANDS AND NEARBY SEA AREA

This paper studies the model and techniques of extracting shallow water depth from TM images and image chart production in Nansha Islands and nearby sea area. On the basis of the conventional multi-band linear regression model, we develop a improved model by introducing a series of techniques including data pre-processing by group averaging, tidal correction, piecewise linear regression, data normalization, etc.. The improved model is more reasonable and accurate and suitable for large sea area. And we also present a set of techniques for remote sensing image chart production.