The paper presents examinations of the surface of base concrete with a 3D scanner. Two base concrete surfaces,
differently prepared, were examined, together with two measurement strategies: simple and fast 3D scanning
and partial scanning in selected areas corresponding to the device measurement space. In order to complete
the analysis of a concrete surface topography an original Matlab-based program TAS (Topography Analysis
and Simulation) was developed for both 2D and 3D surface analyses. It enables data processing, calculation of
parameters, data visualization and digital filtration.