摘要
以资源三号卫星影像数据为例,基于RPC模型提出利用SRTM辅助的卫星影像区域网平面平差的方法进行超长距离控制外推,来提高无控地区的影像几何定位精度。试验表明,影像原始RPC直接定位精度含有明显的系统误差。在起算影像区域内布设一个控制点进行区域网平面平差,沿轨外推11景(491.62 km)、垂轨外推6景(282.36 km)后,相比原始影像13.335 m的平均定位精度,其外推区域影像的几何定位精度可优于7.5 m,无控区域的整体定位精度有明显提升,验证了该方法的有效性。
Using ZY3 satellite image as an example, plane block adjustment based on RPC model is used to extrapolative positioning with SRTM, improving accuracy of positioning without GCPs. The experiment shows that directly positioning accuracy includes large systemic error. Once a ground control point is introduced in top left corner of test area . Positioning accuracy of images form region without GCPs is better than 7.5m and has a great improvement.
出处
《测绘与空间地理信息》
2016年第2期196-198,201,共4页
Geomatics & Spatial Information Technology
