The mapping accuracy of satellite imagery block adjustment 卫星遥感影像的区域网平差成图精度
2.
Mapping accuracy to less than 2 pixels in xy - plane and 4 pixels in height can be achieved for plain operators 初步评估一般航测作业人员应可达两像元之平面位置较差，与四个像元之高程较差，足敷数位摄影测量实习。
3.
Because the elevation data we have acquired through gps is too variable to satisfy the mapping accuracy requirement the elevation value is solved by the water lever observation in the hydrology station and datum horizon correction of sounding observation 由于gps的rtk模式测量所获取的高程精度不能满足测图精度要求，因此其高程值是通过测量水深值、结合其统一到基准面的改正数、根据相关水文部门各水位站提供的水位观测资料综合计算获得。
