POS支持下的构架航线定位精度探讨

Position Precision to Control Strip on Supporting by POS

垂直飞行于常规航线能够替代每条基本航线两端的高程控制点,可提高影像定位的高程精度。以附带POS数据的UCXp航空数字影像为例,探讨在区域四角基本航线与构架航线交叉的位置,布设野外像控点组,设计仅有影像姿态数据参与、仅有像控点参与、影像姿态数据+像控点共同参与等3种空中三角测量方案,用于检测1∶10000平地成图的加密精度。结果表明,影像姿态数据+像控点共同参与的加密方案,其成果平面精度较高,高程精度可以明显提高。

The control strips aviating on basic route vertically can displace the demanded elevation control points of each basic routine endpoint to enhance the elevation precision of the image position.As an example of UCXp digital aerial images with overhanging POS data,this article layouts the field image control points group at the four corners with the overlap area between the basic routes and the control strips and then designs three aerial trianglulation schemas,including image attitudes data only,image control points only,image attitudes data and image control points together etc.for checking the bridging precision on flat area to 1∶10000 mapping.It is proved in practice that the bridging schema about the image attitudes data and image control points to participate in together have the higher plane precision and improve the elevation precision clearly.