不同像控布设方案在航片DOM生产中的应用研究

Research on Different Image Control Point Layout Plan Applications in Aerial Photo DOM Production

在空中三角测量中,为了减少外业实测像控点的工作量,需对外业像控点的布设方案进行研究和优化,保证成果精度的同时提高效率。根据相关规范的要求,可通过实验验证将结果在设计书中进行明确,基于此,结合项目生产经验,选取一块具有代表性的区域,设计了3种像控点布设方案,通过比较空中三角测量加密精度和影像平面精度,分析确定最优的像控点布设方案。通过验证分析,按照航向跨度30条基线、旁向跨度6条航线、单点布设的区域网布点方案为外业像控点最优布设方案,既保证质量又兼顾效率。因此通过适当放宽外业像控点布设间距的布控方法,在保质增效上具有很好的效果。

In aerial triangulation, to reduce the workload of field-measured image control points, it is necessary to research and optimize field image control point layout plan to ensure result accuracy and improve efficiency. According to the relevant specification requirements, the results can be clarified in design books through experimental verification. Therefore, we selected a representative area based on the project production experience, and designed three image control point layout schemes. By comparing aerial triangulation accuracy and image plane accuracy, we analyzed and determined the optimal image control point layout plan. Through verification and analysis, the regional network point layout plan with30 baselines in the heading span, 6 routes in the lateral span, and a single point layout is the optimal layout plan for the field image control points,which does not only ensure quality but also take efficiency into account. Therefore, the method of appropriately relaxing field image control point layout has a very good effect in quality assurance and efficiency improvement.