高分辨率航带影像像控点的布设和基准约束测量

推扫式航摄仪所获取的带状影像，其每个像素都具有比较准确的WGS-84坐标。带状影像模型自成刚体，具有很强的稳定性，但其区域网模型精度在高程方面偏弱。受其自身航带影像模型刚性和区域网弱高程模型精度的影响，其像控点布设有其自身的特殊性。在获取具有多重空间基准约束的像控点的过程中，当在像控区域中有CORS基站、GPS控制网、水准控制网等多个空间基准类型可以利用时，可利用IGS站点和EGM2008数据快速验证这些基准的应用有效性，避免已有空间基准的潜在问题，这是保证像控点快速和精确获取的关键。

Layout and Reference Constraints Surveying of Image Control Points for High-resolution Aerial Strip Images

Each pixel of strip image obtained by push-broom aerial photography system has precise coordinates of WGS-84.The stereomodel formed by aerial strip image is rigid,bearing strong stability,but has low precision in Z coordinate after carried on aerial triangulation adjustment.Because of influenced by model's rigidity and the low precision of model's Z coordinate,layout of model's image control points for aerial triangular adjustment is different from other situations and has its own particularity.When surveying the image control points is carried on under multi-spatial reference constraints without other choices,including CORS base station,GPS control network,level control network etc.in aerial photograph region.It is key point to validate the coordinate precision of the control points in existing spatial reference with IGS points and EGM2008 data to avoid the their potential errors and make certain the image control points can be surveyed quickly and precisely.