Geodetski list, Vol. 69 (92) No. 1, 2015.
Original scientific paper
Analysis of Accuracy Levelling Measurements and Integral Adjustment of Precise Levelling Network (II. NVT)
Milan Rezo
; Faculty of Geotechnical Engineering, University of Zagreb, Varaždin, Croatia
Danko Markovinović
; State Geodetic Administration, Zagreb, Croatia
Marko Šljivarić
orcid.org/0000-0002-6868-2066
; Geodezija Ltd. Šibenik, Šibenik, Croatia
Abstract
Complete analysis of levelling traverses and levelling meshes in II. NVT network (second high accurate levelling network) is given, together with calculated closures, reference mean error and reference probable error as base for determination of accuracy criteria. After-calculation analysis of reference probable error with respect to the number of traverses in closing mesh, as well as the number single standpoint observations in each traverse. Value of constant variables for normal orthometric correction are calculated and an impact of height and latitude determination at endpoints of mesh edge is analysed regarding to each single value of orthometric corrections. For the first time, single adjustment of II. NVT network is done by method of indirect observations with a fixed reference benchmarks on five tide gauges and obtained results are compared with official, previously done, adjustment of levelling meshes in II. NVT network for the Croatian Republic.
Keywords
levelling edge; levelling traverse; levelling mesh; normal orthometric correction; integral adjustment
Hrčak ID:
137557
URI
Publication date:
20.3.2015.
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