GCP error propagation model for geometric correction and its application
控制点误差传播模型及其应用

In order to obtain a residual error map for remote sensing data after geometric correction, a GCP error propagation model was proposed. First, GCP error source was analyzed and modeled. Second, error free for geometric correction model and the uncertainty of GCP caused uncertainty of model parameter which may then be propagated to all the whole area considered were assumed. Finally, a general GCP error is defined to revise error propagation model and this alteration made the model suitable for more general condition. The proposed model is suitable for appreciate GCPs number selecting, allowable GCPs error deciding and suitable spatial arranging. This model also is very useful in remote sensing product quality control because it made it clear where residual error occurred and how much it is and we can use the final product wisely.