To represent statistical and other datasets in a map the data has to be processed and analysed. Data processing deals with the verification of the data quality and integrity. Furthermore, the data has to be processed for data analysis. Data analysis deals with the specific characteristics of the data. If there is only one attribute in the data it can either be visualised by continuous depiction of quantities or depiction of intervals. If there is more than one attribute relevant diagrams have to be used to visualized the data.