As geodetic components of the SDI there are here understood those products of geodetic activities, which are specified w.r.t. their characteristics and methodological, technological, qualitative, legal and other requirements in technical guidelines of the Surveyor General. To this kind of products belong those, for which in fact the guidelines informally define information models such as base map, topographic map, cadastre, registry of utilities (GESUT), reference networks, geodetic and cartographic repositories, and others. In most cases they serve as reference data for localization of objects in geographic information systems. This report is devoted to some concepts of harmonization and integration of solutions contained in the guidelines with standard principles, according to ISO series 19100 standards, conceptual schemas for geometry and topology, for describing object positions, for temporal aspects, for data quality and for metadata. Such harmonization is required to provide internal interoperability of national SDI elements, as well as because of crucial character of the national reference data for the ESDI.

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