The first step of noise mapping is preparation of genuine input data, which is the most critical task of the process, mainly because of the lack of the proper form of such type of data. After collection of all required data, they are represented in a model. This usually implies numerous adjustments within the model, both regarding geometry of the source and adjustments of acoustic data. Occasionally, due to its iterative nature, the process requires repeated measurements and verification of the noise sources operation regime.