Boleslovas Krikštaponis, Eimuntas Kazimieras Paršeliūnas, Povilas Viskontas, Algirdas Neseckas,
Evelina Zigmantienė, Ričardas Kolosovskis, Arvydas Musteikis, Eglė Tumelienė, Rosita Birvydienė, Petras Petroškevičius
Designing issues of the geodetic vertical reference network of Lithuania
Conference Information: |
9th International Conference “Environmental Engineering”, 22–23 May 2014, Vilnius, LITHUANIA |
Source: |
ICEE-2014 - International Conference on Environmental
Engineering |
Book Series: |
International Conference on Environmental Engineering
(ICEE) Selected papers |
ISSN: |
eISSN 2029-7092 online |
ISBN: |
eISBN 978-609-457-640-9 |
ISBN: |
ISBN 978-609-457-690-4 CD |
Year: |
2014 |
Publisher: |
Vilnius Gediminas Technical University Press Technika |
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Abstract
Activities of Lithuanian National Geodetic Vertical
Reference Network (NGVRN) establishment are going on
since 1998. The goal of NGVRN establishment is a creation
of new Lithuanian height reference suitable for present
period practical and scientific needs. The Lithuanian
Geodetic Vertical First Order Network consists of five
polygons. Perimeter of the network is ca. 1900 km. Its
Development was finished in 2006. Connections of the
first order vertical network with the vertical networks
of neighbouring countries were established. All this
creates good preconditions for determination of relations
between height systems and for introduction of a new Lithuanian
geodetic vertical (height) system. But this network is not
dense enough to transfer the geodetic vertical system to
the all territory of Lithuania and to improve the geoid model.
It is necessary to dense available First Order Geodetic Vertical
Network by developing the Second Order Geodetic Vertical Network.
The territory of Lithuania is divided into five regions. Borders of the regions
are First Order Network levelling lines and lines connecting Lithuanian national
Vertical Network to the corresponding networks of the neighbouring countries.
The regions are called: South, East, North, West and Centre. The design of
the Second Order Geodetic Vertical Network is presented. The necessary
density, accuracy of the geopotential numbers and ellipsoidal heights
are discussed. Some results of the geodetic measurements are presented too.
Keywords: Geodetic Vertical Network; levelling; geopotential number; ellipsoidal height.
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