This paper concerns issues related to a land transformation into an optimum land use condition in the light of functionality and costs, with a focus on creating a concept of spatial information system structure, covering data, characteristics or methods useful in rational space planning management. A diagnosis of space values, based on the Bajerowski’s method of characteristics generating optimum use matrix, is incomplete and insufficient for making decisions based on them, as model comparison units are missing for some land use conditions [Bajerowski 1996]. On the basis of studies carried, it is proposed to add anthropogenic characteristics to this method, and to include rational decision theory and game theory in the comparison units model building, for all values of land functions, using a computer programme as a tool. Studies cover a verification of spatial information system construction functionality, by comparing (comparison units) values of land sold by tender in computer stimulator and by Olsztyn City Council in 2005 and 2006.

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