Methods of Determining Non-Position Points in Hydrographic Survey
Yanchun Liu · Jisuanji fangzhen · 2007
To analyze expressing seafloor topography capability with survey lines in hydrographic survey, several detecting parameters of survey lines and new concepts were proposed in survey lines data processing, namely approached representation error, direction bias and displacement bias. Three math models were given for expressing positions of depth points. The transform equation and the transform conditions were brought up among them. Least Squares Collocation (LSC) was introduced during determining Non-position-point (NPP) depth. Some simulations and analyses were carried out. The results demonstrate that the survey line models are all met to survey requirements when the detecting parameters of survey lines are adopted appropriately. Meanwhile, LSC can conveniently determine NPP depth and its precision through using information of local depth field.