海道测量中非定位点的精密确定方法

为了分析海道测量中测线对海底地形的表征能力,提出了用于测线探测的参数以及拟合代表误差、方向偏差、平移偏差等测线处理的新概念,给出了表述水深点位置的三种数学模型及它们相互间的转换关系和转换条件,并将最小二乘配置法引入到非定位点水深值的估计中。仿真试验及实测数据处理结果表明:当采用了合理的测线探测参数时,提出的三种测线模型均可满足测图的需要;最小二乘配置法可以充分的利用区域深度场信息求出非定位点的水深值,并且方便于精度评估。

Methods of Determining Non-Position Points in Hydrographic Survey

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.