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Monitoring and 3D modeling of an objective can only be done on the basis of high-precision topo-geodetic measurements, but also on the basis of UAV (drone) technologies, thus resulting in an overview of a certain study area. In this context, the present work aims to develop the creation of the 3D model of a grassland surface following a topographic survey by means of GNSS technology and specialized programs. This topographic survey was carried out with the Leica Viva GS07 GNSS equipment, an instrument that contains a wide range of applications. In this work, I used the Real Time Kinematic method to determine the points based on which I created the 3D model in AutoCAD using the TopoLT program. Because the data obtained is complex, in addition to 2D plans, we also have information that can be analyzed in 3D. For studies regarding the shape and the way of exploitation of the land, we created a digital model of the land which is the 3D digital representation of the respective surface. Based on the digital terrain model, we can easily visualize the relief of the grassland, in the present case the minimum altitude is 572.50 m, and the maximum altitude is 590.00 m, with a level difference of 17.5 m over the entire area. This digital terrain model can also be used to model water flow or other geomorphological processes that occur in the analyzed grassland (landslides, erosion, etc.). Multiple longitudinal or transversal profiles can be created over the entire surface to better observe the relief of the land.
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