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Original Paper.
Author(s) -
Dimitrios AMPATZIDIS,
Rolf KOENIG,
Nikolaos DEMIRTZOGLOU
Publication year - 2002
Publication title -
histopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.626
H-Index - 124
eISSN - 1365-2559
pISSN - 0309-0167
DOI - 10.1046/j.1365-2559.2002.14893.x
Subject(s) - citation , computer science , information retrieval , library science , world wide web
Accurate heights are needed in engineering and geodynamics. The classical technique of height determination is spirit leveling. In recent years GNSS-leveling offers an efficient alternative. The paper deals with the combination of existing leveling networks. In many cases, in a specified area more than one leveling network exist, realized at different epochs and based on different techniques and instrumentation. Hence, the surveyor should have the capability to exploit all the existing height information in order to establish an optimal network, i.e. the most accurate one. We describe a methodology for the optimal combination of vertical networks when these share some common benchmarks. Its advantage is the fact that all the existing height information can eventually be transferred to a new vertical network that is more accurate than the individual networks. The approach is tested on three co-located leveling networks (one trigonometric network, two spirit leveling ones) in a regional area located in Greece. The results reveal a significant improvement of 5 mm of the standard deviations of the height estimates compared to the prior situation. ARTICLE INFO Article history: Received 8 January 2015 Accepted 9 July 2015 Available online 31 July 2015