The article presents the work conducted during the compilation of the Slovenian Linguistic Atlas (SLA) by the Dialectological Section of the Fran Ramovš Institute of the Slovenian Language at the Scientific Research Centre of the Slovenian Academy of Sciences and Arts in Ljubljana. Special software (SlovarRed 2.0), based on a carefully designed database linked to the geographical information system (GIS), was developed. It not only allows accurate input of dialectological data and their analysis at different language levels but also the application of different cartographical methods (i.e., displaying linguistic data on a map). Considering the diversity (including in terms of data quality and relevancy) of the material collected in the last...