Storage of Underground Utilities Data in Three-Dimensional Geoinformation System : Shranjevanje podatkov o podzemni infrastrukturi v trirazse nostnem geoinformacijskem sistemu

The article presents a research on data of underground utilities like electrical power distribution grid, water, gas, heating distribution systems, sewer, and telecommunication systems storage in threedimensional geoinformation system for municipality purposes. Besides topography, municipalities store underground and aboveground utilities data collected by surveyors. Collected geodata are treated as legal data and they are used for urban planning, designing purposes and permissions issue for constructing or reconstructing purposes. It is shown, how the existing data could be transferred to the 3rd dimension. An algorithm has been created for calculation of the heights of underground utilities. Requirements for data capture in three-dimensional geoinformation system are discussed and presented.