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Use of the topographic deflections of the vertical for computation of the quasigeoid

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU136285" target="_blank" >RIV/00216305:26110/20:PU136285 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.taylorfrancis.com/books/e/9780429327025" target="_blank" >https://www.taylorfrancis.com/books/e/9780429327025</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1201/9780429327025" target="_blank" >10.1201/9780429327025</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Use of the topographic deflections of the vertical for computation of the quasigeoid

  • Original language description

    The aim of this study is to open the possibility to substitute the gravimetric deflections of the vertical with the topographic ones in some cases. The topographic deflections of the vertical have a great advantage in the data availability for the calculation compared to the gravimetric ones. The detailed gravimetric data for the gravimetric deflections of the vertical calculation are not commonly accessible in many countries. On the contrary, topographic deflections of the vertical can be computed from the global digital elevation model with high resolution, for example SRTM (Shuttle Radar Topography Mission), or GMTED2010 (Global Multi-resolution Terrain Elevation Data 2010). These models are freely available. The profile of Velká Bíteš – Brno – Uherské Hradiště in Czech Republic was chosen as the test area. There are mountainous as well as flat areas on the profile route. There is the greatest gradient of the height anomaly of the Czech Republic in this area. The profile consists of 581 points. On these points, three different types of deflections of the vertical were computed: gravimetric, topographic and deflections from the geopotential model EGM2008. The astrogeodetic deflections of the vertical were measured on 30 evenly distributed points of the profile and the GNSS/levelling was performed on 15 points of the profile. The terrain model GMDET2010 was chosen for the calculation of the topographic deflections of the vertical. The topographic deflections of the vertical were fitted on the deflections calculated from EGM2008. The fitted topographic deflections were compared with the gravimetric deflections, after that, the quasigeoid separation (height anomalies) on the profile was computed using the astronomical levelling method. The root mean square error of the differences between the gravimetric and the fitted topographic deflections of the vertical is 0.53’’ in the meridian component ξ and 0.69’’ in the prime-vertical component η. The root mean square error

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    10508 - Physical geography

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Advances and Trends in Geodesy, Cartography and Geoinformatics II

  • ISBN

    978-0-367-34651-5

  • ISSN

  • e-ISSN

  • Number of pages

    6

  • Pages from-to

    123-128

  • Publisher name

    CRC Press/Balkema

  • Place of publication

    London

  • Event location

    Demänovská dolina

  • Event date

    Sep 10, 2019

  • Type of event by nationality

    CST - Celostátní akce

  • UT code for WoS article