Operational information system is not one-shot affair, but it is a process of gradual building up and improvement. Already existing UNIX-system with ARC/INFO together with PC versions ARC/INFO is a basis of modern information system and GIS in the VUPOP. After some innovation, this software basis is a platform for wide spectrum of GIS applications necessary for Earth surface analyses, ecological analyses and modelling. The pedological information system is kept and permanently updated by the Soil Science and Conservation Research Institute. During the last 15-20 years, the conditions for linkage of the pedological information system with the systems of other institutions (e.g. Research Institute of Economics of Agriculture and Food Production, Land Register) were created. The GIS is earth related, it introduces a lot of different professional information linked with many organisations. From this, a requirement of content and terminological unification follows. Linkage of the base system, database and methodology makes it possible for user to use the professional data of soil information system. It is a significant component of other possible applications.