基于海图和ASTER GDEM数据融合的水陆一体连续地形构建

Continuous terrain construction of water-land integration by integrating bathymetric maps and ASTER GDEM Data

河口海岸地区的地形观测是地貌演变和稳定性研究的基础。为了快速获得该地区的水陆一体连续地形模型,提出基于空间误差校正的多源地形数据融合方法。以我国长江口典型河口地貌类型区为试验样区,对海图与ASTER GDEM数据特性进行比较分析,通过二次曲面拟合算法有效降低了两种地形数据间的高程差异,成功提高了融合结果的数据质量。结果表明:该方法为河口地区相关测绘提供一种高效快速的解决方案,可作为野外测量任务规划的决策依据,能够克服传统测绘方法数据冗余、成本过高等缺陷,具有一定工程意义。

Topographic observation in estuarine and coastal areas is the basis of geomorphic evolution and stability study.In order to quickly obtain the integrated terrain model of land and water in this area,a multi-source terrain data fusion method based on spatial error correction was proposed.Taking the typical estuarine geomorphic area of the Yangtze River estuary as the experimental area,the data characteristics of chart and ASTER GDEM are compared and analyzed.Through the quadric surface fitting algorithm,the elevation difference between the two topographic data was effectively reduced,and the data quality of the fusion result was successfully improved.The results show that:this method provides an efficient and fast solution for the relevant mapping of estuarine area and can be used as the decision-making basis of field survey task planning,and can overcome the defects of data redundancy and high cost of traditional survey methods.It has certain engineering significance.