Selection of interpolation parameters depending on the location of measurement points

Digital terrain models (DTM) are created increasingly often on the basis of data recorded automatically. In the processing of such sets, there is often a need to organize the measured values and present them in the form of a specific GRID (a regular grid of nodes: the points forming the DTM are located in the corners of squares with a specified side length) or TIN (triangulated irregular network) structure. The correct setting of processing criteria and the proper selection of the structural parameters of a given structure are important factors influencing terrain model accuracy. The GRID structure not only allows data to be organized, but also increases the efficiency of data processing in LIS/GIS (land information systems/geographical information systems). If a large volume of measurement data is acquired, using the GRID structure reduces its volume and eliminates redundancies. To maintain proper DTM quality, it is necessary to set correct processing parameters during the construction of the network forming the GRID structure. This paper analyzes the effect of measurement point distribution on the selection of the structural parameters of a regular square grid used to create the digital bottom model.