Problem of Bathymetric Big Data Interpolation for Inland Mobile Navigation System

Depth information is crucial in most navigational analysis and decision support implemented in existing inland navigation systems. Bathymetric data sets needs to be preprocessed and converted into Digital Terrain Model by interpolation methods to provide different vector layer for Electronic Navigational Chart. Data for inland waters needs to be precise and valid due to quickly alternating inland environment and much shallower areas than on marine waters. At the same time visual effect of created layers needs to be readable and easily interpreted by a navigator. In this paper authors analyze different interpolation method for DTM building from the perspective of accepted criteria. Created depth contours are the base of navigational analysis provided by mobile inland navigation system MOBINAV. The experiments used real inland data from bathymetric surveys conducted on waters of Szczecin area.