摘要
由于地球曲率等的影响,采用解析法计算大区域、小比例尺海域面积,会引起海域测量面积变形,影响用海面积的计算精度。通过分析解析法引起面积变形的特点,定量分析了纬度差、投影方式与中央经线选择、坐标转换等海域面积计算精度影响因子,提出可采取选择合理的界址点间距、恰当的中央经线、基于椭球面计算等方法来提高海域面积的计算精度。
Due to the curvature of earth, the sea area deformation can be easily caused and further the accuracy of sea area calculation can be affected by using analysis methods to calculate the sea area with a large scale. Based on the analysis of the characteristics of sea area deformation caused by the analysis methods, the factors impacting the accuracy of sea area calculation, such as the difference of latitude, the selections of projection and central meridian, the methods of coordinate transformation and so on, are evaluated quantitatively. It is recommended that the reasonable interval of boundary points, the proper central meridian and the calculation based on earth ellipsoid should be adopted for improving the accuracy of sea area calculation.
出处
《海岸工程》
2013年第4期8-15,共8页
Coastal Engineering
基金
中央级公益性科研院所基本科研业务费专项资金项目--岸滩演变过程对人类活动的响应机制研究(2010G17)
国家海洋局青年海洋科学基金项目--基于椭球面积的海域面积精确计算模型(2010611)
关键词
海域面积
面积计算
综合管理
解析法
sea area
area ealculation
integrated management
analysis method
