Abstract: Height determination is one of the important factors in determining three-dimensional positions of objects. Of course, depending on the purpose of a survey, height may be ignored, but in most cases, it is considered an essential factor in determining the positions of objects through surveying. Although a direct leveling method is generally used for height determination, there are many difficulties involved in performing direct leveling in mountainous areas. In order to overcome this drawback, an indirect method of height determination through Global Navigation Satellite System (GNSS)/leveling has been used recently. GNSS/leveling can be utilized in mountainous areas where it is difficult to perform direct leveling, and it can also be used in drone surveying, which has recently been used in various fields, and in the surveys for construction design considering the elevations in mountainous areas.....
Keywords: GNSS/leveling; Geometric arrangement; Orthometrc height; Geoid model.
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