测线布设方向的不同对海底显示的影响

The Effect of the Different Hydrographic General Line Direction on the Seabed Display

通过对几种典型海底沿不同方向布设测线所得到的拟合海底与原海底进行比较,发现测线布设方向的不同对海底显示的影响可归结为两种效应:平滑效应与伸缩效应。同时指出:对非线性平坦海底,沿梯度总方向布设测线、对于海底闭包按极坐标法布设测线可以很好地消除这两种效应的影响,从而达到完善海底显示的目的。实例分析结果验证了结论的正确性,该法可用于实际作业提高测深线布设对海底显示的准确度,同时直接构成海道测量智能设计系统的测深线自动布设建模。

Through comparing the true sea bed with the interpolated sea bed,this interpolated sea bed is derived from surveying several typical sea bed along different survey line directions,and we discovered that the effect of different survey line direction on the sea bed display can be concluded into two effects: smoothness effect and flex effect.In order to eliminate the effect successfully,for nonlinear flat sea bed,we design the survey line along the general direction of gradient,for closed sea bed physiognomy,we use the polar coordinate position method.The result of the example demonstrates the effectiveness of this method.Moreover this method can be used in hydrographic survey to enhance the accuracy of the sea bed display and constitute the model of the automatic survey line design in the system of the intelligent hydrographic survey design.