Review article

Analysis of the Height Differences of GPS-points in the Old and New Height System at the Test Territory of the City of Zagreb

Martina Gucek ; Geofoto Ltd., Zagreb, Croatia

Abstract

In this work the analyzes of height differences of GPS points of homogenous fields in old (HVRS 1875) and new Croatian height referents system (HVRS71) is examined. The examination is carried out on the test field of the City of Zagreb. In the course of field work, normal orthometric heights of 27 GPS points in the new height system are determined by transacting the heights from the benchmarks having various order of accuracy with geometrical leveling method. In that way GPS/leveling points are defined with known ellipsoidal and normal ortometric height. The comparison and analyzes of reduced undulation calculated from local geoid of Zagreb and official geoid of Republic of Croatia (HRG2000) are cared out. In addition, analyzes of normal orthometric heights of the same GPS points in old (HVRS 1875) and new (HVRS71) height systems are tested and analyzed.

Keywords

Croatian height referents system 1971 (HVRS71); GPS/leveling points; normal orthometric height; ellipsoidal height; undulation

Hrčak ID:

11521

URI

https://hrcak.srce.hr/11521

Publication date:

16.3.2007.

Article data in other languages: croatian

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