發(fā)布時(shí)間：2018-10-11 10:23

【摘要】：根據(jù)遙感水深反演原理,利用海南島龍灣港的World View-2多光譜衛(wèi)星數(shù)據(jù)和海圖水深資料,通過對(duì)水深進(jìn)行0~2,2~5,5~10,10~15和15~20 m的分區(qū)處理、潮汐改正和海圖水深數(shù)據(jù)與相應(yīng)圖像波段反射率值的相關(guān)性分析及回歸分析,建立了淺海水深線性回歸反演模型,開展了淺海水深的實(shí)際計(jì)算與精度分析。結(jié)果表明:對(duì)不同水深范圍分別建立線性回歸模型反演的水深精度要高于未分區(qū)建立的模型;分區(qū)模型中,多波段模型在0~5 m的反演精度最高,而雙波段比值模型在5~20 m的反演精度最高,但是反演水深在最淺處的精度還有待提高。本文方法提取的水深與海圖水深數(shù)據(jù)變化趨勢(shì)基本相似,可以滿足海洋科學(xué)研究對(duì)大范圍淺水水下地形探測(cè)的要求。
[Abstract]:According to the principle of remote sensing water depth inversion, using the World View-2 multispectral satellite data of Longwan Port, Hainan Island and the bathymetric data of the chart, this paper deals with the water depth by dividing the water depth of 0 ~ 2 ~ 2 ~ 2 ~ 5 ~ 5 ~ 5 ~ 10 ~ 10 ~ 10 ~ 15 m and 15 ~ 20 m. The correlation analysis and regression analysis between the tidal correction and the depth data of the nautical chart and the reflectivity values of the corresponding image band are analyzed, and the linear regression inversion model of the shallow water depth is established, and the actual calculation and precision analysis of the shallow water depth are carried out. The results show that the inversion accuracy of the linear regression model for different water depth ranges is higher than that of the unzoned model, and the multi-band model has the highest inversion accuracy at 0 ~ 5 m in the zonal model. The inversion accuracy of the dual-band ratio model is the highest at 5 ~ 20 m, but the accuracy of the inversion depth at the shallowest point still needs to be improved. The variation trend of the bathymetric data extracted by this method is basically similar to that of the nautical chart, which can meet the requirements of marine scientific research for large-scale shallow water underwater topography detection.
【作者單位】： 上海海洋大學(xué)海洋科學(xué)學(xué)院;上海市海洋局河口海洋測(cè)繪工程技術(shù)研究中心;
【基金】：上海市科委基于國(guó)產(chǎn)高分辨率衛(wèi)星的海洋測(cè)繪關(guān)鍵技術(shù)研究項(xiàng)目資助(14590502200)
【分類號(hào)】：P715.7

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