The other method is to reconstruct small sub-areas separately. The distortions can be controlled through georeferencing process. Photos from “Region A” were selected as sample data. CMPMVS was implemented and the Blue-red-yellow markers (as shown in Figure 59) were used for georeferencing the model. The result is shown in Figure 84. The accuracy of the model is improved dramatically. When using all the photos together, this area has an average displacement of 0.093 m, which is not quality for scientific studies. Now the number has decreased to around 0.056 m. Most of the points are located at the right positions.