水深源数据不确定度在TIN水深建模中的传播规律分析

在确定水深源数据的水平和垂直不确定度的基础上,分析了水深源数据不确定度在三角网水深建模过程中的传递机制,推导了水深源数据不确定度对水深模型影响的公式。通过理论分析可得:水深源数据水平不确定度的传播会受区域内水深变化的影响,即区域水深变化越大,其对水深模型不确定度的影响就越大;水深源数据垂直不确定度的传播不受其他因素影响,其会直接传递到水深模型表面的各点上。

Propagation Analysis of Depth Source Data Uncertainty in TIN Depth Modeling

The horizontal and vertical uncertainty of depth source data is calculated,and then the propagation of the depth source data uncertainty is analyzed in TIN depth modeling. Finally the formula of the depth model uncertainty influenced by the uncertainty of the depth source data is acquired. The theoretical analysis shows:the propagation of the horizontal uncertainty of the depth source data is influenced by the depth variations in the modeling area,which means that the larger the depth variation is,the greater its influence to the depth model uncertainty is;the vertical uncertainty of the depth source data would propagated to the points on the depth model surface directly,without being influenced by other factors.