The foregoing results only show that models from the UAV dataset have displacements with the models from the ground photo dataset (the Nikon), which means one model is less accurate than the other. In order to find out which model is less accurate, survey points were used for comparisons.
North-east corner of the temple has a larger displacement between two models. Therefore the north-east site was selected as the target area. Figure 75 shows the cloud-mesh distances computed from the UAV model. The survey points match very well with the mesh model in general. Most of the values are between +0.02 and -0.06, This result is qualified for accurate GIS model reconstruction. Figure 76 shows the Cloud-mesh distance computed from the Nikon model. The model has a slight shift with the survey points. Values in the diagram are mainly concentrated in the middle; most of the values are concentrated from -0.09 to -0.13.