James_et_al_2020_BdA_GCP_data

James et al. (2020) - Mitigating systematic error in topographic models for geomorphic change detection: Accuracy, precision and considerations beyond off-nadir imagery<br>GCP coordinates in Swiss Grid CH1903/LV03 (EPSG::21781) for associated UAV surveys of la Borgne d'Arolla.<br>Notes:GCP ground survey data acquired by total station. Precision values are relative estimates (i.e. within the network) rather than absolute georeferencing, and were computed from least-squares network adjustment of data acquired from three stations. Absolute georeferencing was achieved using three dGPS-surveyed station positions; absolute georeferencing precision was not comuputed, but is not expected to be substantially worse.GCP 4 was covered by sediment prior to image capture, so not used in the photogrammetric processing.<br>See paper for further details.James等人（2020）——《面向地貌变化检测的地形模型系统性误差抑制：精度、精准度及非天底角影像（off-nadir imagery）之外的考量》 配套拉博尔讷达罗（la Borgne d'Arolla）无人机航测项目的地面控制点（Ground Control Point，GCP）坐标采用瑞士网格坐标系CH1903/LV03（EPSG::21781）。 备注：地面控制点野外测量数据采用全站仪采集。精准度数值为相对估值（即测网内部的相对精度），而非绝对地理配准精度；该值通过对3个测站采集的数据进行最小二乘网平差计算得到。绝对地理配准通过3个经差分GPS（Differential GPS，dGPS）测量的测站坐标完成；未计算绝对地理配准的精准度，但预计其精度不会显著偏低。4号地面控制点在影像拍摄前被沉积物覆盖，因此未参与摄影测量处理流程。更多细节请参阅该论文。