The influence of silvicultural and forest indices on the accuracy of a GPS-survey of the forest areas

Abstract

The intensive development of space geodesy leads to more active implementation methods of global satellite positioning in various spheres of the person’s activity, including forestry. Such surveying methods enable the computer collection process and navigation binding of forest measurements data, eliminate the need to create line visibility between points, allow you to perform surveillance in any weather, both day and night-time measurements and data processing are almost completely automated. However, the use of GPS-equipment under the canopy of the forest has its own characteristics. To study the influence of the habitat conditions, silvicultural and biophysical parameters on the accuracy of a GPS survey of the forest areas satellite measurements are made in the Negoreloye experimental research training forestry. For the measurements we used another set of single-frequency satellite receivers Trimble R3. A GPS-survey was carried out in the kinematic regime of „stop & go” in combina-tion with the regime „on the fly”. When conducting the research such silvicultural and inventory indices, as forest type, age, class, the fulness, etc., were taken into account. It was found out that a key indicator affecting the accuracy of a G PS-survey is a sp ecies composition.