基于POS与卫星地图改进的地图匹配定位方法

摘要

针对目前利用地图匹配定位受底图影响大、精度低、应用范围受限的问题，根据航摄影像与POS数据以及数字卫星地图特点，提出一种基于POS与卫星地图改进的地图匹配定位方法。利用卫星地图改良传统底图扩大应用范围，其次利用POS数据，根据制定的搜索策略确定整张航片在卫星地图上的匹配区域，以提高定位速度。实验结果证明该方法无需地面控制点即可实现大范围的目标实时二维定位，而且定位精度与速度都有较大提高。%The current map matching positioning method has such disadvantages as high influence from base map,low accuracy and limited application range.In view of these problems,this paper proposes an improved map matching positioning method based on POS and satellite map based on the characteristics of aerial image,POS data and satellite digital map.In order to increase the positioning speed,the base map is improved to extend the application range by using satellite map,and the matching area of the whole aerial image in satellite map is determined according POS data and search strategy. The experimental results show that this method can achieve a wide range of real⁃time two⁃dimensional positioning without ground control points,and the precision and speed are improved.