The areas of mining require specific treatment in the building investment process. In accordance with the applicable provisions, the data and geodetic/cartographic studies are an integral and important source of data used for designing purposes. They must meet certain requirements, primarily in terms of accuracy. This applies to both fundamental maps and points of geodesic network, which should be constantly updated. For this reason, the author proposes a tool in the form of a software Explon ver. 5.1., which allows to predict changes of coordinates of the points of geodetic network caused by the influence of mining activities. Tests were carried out in the part of seam Marklowice, which is or was under the influence of mining exploitation. Based on estimates obtained from Explon program ver. 5.1 the author has proposed adding to the information cards of a point, the information regarding coordinates of points obtained from the projections, a graph illustrating the changes of point’s position caused by the in- fluence of mining activities and a comment whether a particular point is suitable for use. Verification of data obtained from the forecasts was made by measuring the coordinates using direct method, by measuring the analyzed points using GPS technology.

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