An outline scheme of the combined geodetic network of Slovenia is presented. Combined geodetic network enables to integrate the three pillars of geodesy: geokinematic, gravity field and Earth rotation. At the national level, it will serve as a good foundation of the modern geoinformation infrastrucutre. The aim of the network is to unite and insure the existent reference frames, divided into classical terrestrial, levelling, gravimetric, and GNSS networks.
F.08 Development and manufacture of a prototype
COBISS.SI-ID: 5708385A project of the new height system of Slovenia is presented. Components of this project are new levelling network of Slovenia, which was in part already measured, and test computation of the new geoid model. Analysis of the levelling survey and comparison of the actual geoid model from the year 2000 and the test geoid model from the year 2010 are presented. Quality of the new spatial reference system, especially of the height component, highly depend upon the quality of the national geodetic infrastructure.
F.16 Improvements to an existing information system/databases
COBISS.SI-ID: 5708641The geodetic profession provides geodetic data obtained in the fields of fundamental geodetic system, real estate and topography. Users integrate this data with other spatial data. The quality of such applications depends on the data quality; however, the providers and the users are not sufficiently aware of the cascading transfer of errors from the primary data layers to the secondary, derived data. Geodesy has traditionally considered errors mainly aspositional errors, according to the law of the transfer of errors. Since theera of widespread digitizing of geodetic data began in the 1990s, data quality in the realm of geographic information systems has been expressed withthe standardized parameters of data quality, and with metadata, of which positional accuracy is just one type. Unfortunately, in this way, the knowledge about which data is a reference can be obscured. To many users, it is not clear what is the specified quality referred to. This article describes, and intentionally uses, the term ćcascadingć, since for the rise ofdata quality one needs to upgrade data level by data level, starting first with the reference data and the semantic definitions of object types, and continuing by updating and harmonizing the secondary data, which were developed from the primary level. The reasons for the change of paradigm regarding the treatment of quality are considered. As the cascading poor quality of geodetic data can become a serious threat for the reputation of theprofession of geodesy, several contemporary applications and projects are described in which this has already happened. In the conclusion, proposals aregiven for improving the situationio
F.14 Improvements to existing production methods and tools or processes
COBISS.SI-ID: 5531233The paper presents a proposal for a new numbering of levelling polygons and benchmarks. Furthermore, an accuracy analysis is done with regard to: measured height differences, residuals calculated from differences of the forward and backward runs, and residuals from loop closures. From the results of the levelling network adjustments, the accuracy of benchmark heights above sea level is estimated.
F.01 Acquisition of new practical knowledge, information and skills
COBISS.SI-ID: 5463137