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1 Badania Fizjograficzne Seria A - Geografia Fizyczna

1 2020

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An Attempt to Use Google Earth Pro Images for Selected Geodetic Works − for Example of Wolności Square in Poznań (Poland)

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Kubiak J. , Magda P.

nr 11 (71)

65-74

The article concerns issues pertaining to satellite geodesy and the possibilities of using the available source materials such as high-resolution satellite maps for selected works which require a high degree of accuracy in determining the location of topographic objects. The purpose of the work was to indicate the potential use of Google Earth maps for selected geodetic works (preparing topographic descriptions, sketch maps) in order to facilitate and accelerate the process. Works were carried out in an urban area, Wolności Square in Poznań (Poland) where 58 checkpoints were located. In order to design them, maps from the Google system from four periods were used. The research used the Global Navigation Satellite Systems set consisting of a Leica GS08 + satellite receiver and a Leica CS15 controller, geodetic software for work design (Trimble GNSS Planning Online) and calculations (C-Geo 8) as well as cartographic materials and data obtained from the Municipal Center of Geodetic and Cartographic Documentation in Poznań: the master map, catalog data and topographic descriptions of the reference points. The results show that the accuracy of the location of points offered by Google is greater than declared by the system operators. However, it is not sufficient for applications in the assumed geodetic works.