Helmert Transformation of Reference Coordinating Systems for Geodesic Purposes in Local Frames

The real-time conditions may develop a need for data originating from the concrete reference system. Sometimes this can refer to the Gauss-Krüger coordinates and UTM projections with a specific datum. This paper analyses a connection between UTM projection with datum WGS-1984 and Gauss-Krüger coordinates for a wider area of the City of Rijeka, without precise need for making the reference to the specific reference coordinate system. Paper also includes the observations of mathematical frames which define Helmert transformations as tool that enables switching from one reference system to another. Additionally, it discusses the needs and possibilities of described tool within GIS and GPS navigation and possibilities of computer program which can modularly be implemented into the specialized programs for Geodesic purposes.