基于六参数仿射变换的控制点选取及坐标校正分析

摘要

Taking the coordinate transformation from latitude/longitude coordinates to Shenzhen local coordinates as an example , in this paper satellite remote sensing images are made use of for fine locating , and the six parameters′values of the affine transformation are solved according to the control points selected through a global searching algorithm .Sequentially , the data sets of distances be-tween the transformed coordinates and the accurate coordinates are compared and analyzed under different constraint objects , with which the group of control points and the formula of coordinate correction that can improve the precision of coordinate transformation ef -ficiently under Shenzhen local coordinate system are finally determined .%以经纬度坐标转换到深圳坐标为例，利用卫星遥感影像，通过全局搜寻算法选择控制点对求解仿射变换六参数值，在不同约束目标下对坐标距离偏差程度进行筛选分析，确定适合深圳坐标下能有效提高校正精度的控制点对组合及校正坐标公式。