There are temporary or permanent physical changes depending on time in earth surface. These physicalchanges named as deformation. The magnitude and direction of the deformation effect must be measured and controlled.The geodetic deformation network is established to determine the deformation movements and the deformationmeasurements are made. Then, the point coordinates are calculated used the free network adjustment. So, the different pointcoordinates were obtained according to measured time. The difference of point coordinate must be test to decide assignificant or insignificant. Thus, the significance test based hypothesis test can be made. In this study, deformation networkwas established in Toybelen village of Samsun province and the deformation measurements were made periodically. Thedeformation network was create with using 15 points and one of these point is the control point. This deformation networkmeasured in two periods used the global positioning system. Evaluation was made using the Topcon program and pointcoordinates were obtained. Differences in point coordinates received and these differences were significant tested. Theprogram written in the matlab program was used for this test. Finally, coordinate values compared in two periods andmovement points have been identified.