The main objective of this research is to study the effect of the accuracy of images' geometric resolution only on the geometric quality of the resulted three-dimensional model. In this research, all factors that affect the quality of the model are fixed and the geometric resolution is changed only for the used images. The number of captured images, the number and the distribution and the accuracy of control points, the camera being used and whether or not it is calibrated, are among the most important factors influencing the modeling process. In order to neutralize the effect of the inner parameters of the used camera, a process of calibration was achieved. On the other hand, we have pre-planned the process of photography to avoid problems resulting from the lack or increase the number of images, that directly affect the quality and completeness of the model. In addition, accurate control data obtained from precise survey work (horizontal geodetic network and leveling network) was applied. In this study, we examined the effect of image resolution on the generation of a dense cloud of points by applying the Structure from Motion (SfM) and deducing the surface model and the orthophoto of a facade of a building at Tishreen University.