In surveying, volume calculating is commonly used. Frequently we use cross-section method. Usually terestrical method is used to determine characteristic points of crosssections. Observations we make on field need to be processed in software packages in order to calculate volume of an object. The calculated volumes may vary depending on the density of measured cross-sections and selection of software package. In this thesis, we compared the course of processing in software packages and volume differences, which we obtained using different software packages and different density of measured cross-sections.