Dr. Tadeusz Gargula
Agricultural Univeristy in Krakow; Poland
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Academic Career Length
25Years (2002-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
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Journal Article
Pelagia GawronekMMMaria Makuch
Maria MakuchBMBartosz Mitka
Bartosz MitkaTadeusz GargulaThe railway system in Poland is undergoing technological transformation. The development of the Polish railway system concerns not only high-speed trains but also infrastructure. The steel bridge is the most popular type of railway bridge in Poland. Most of them were built in the 1950s and 1960s. According to the recommendations in place in Western Europe, such railway bridges should be reviewed in terms of their fitness for use with modern high-speed trains. The modern technological revolution affects not only the railway, but also developments in displacement and deformation measurement techniques. New technologies provide more objective measurement results and accelerate results processing. They also facilitate the non-contact measurement of bridge structure stability. The authors investigated the vertical displacement of an old steel railway bridge in three different, specific case studies of terrestrial laser scanning data application. Then, the results of 3D data were compared with traditional land surveying results. The scientific results led to a conclusion that a strictly determined methodology of the measurement and analysis of a terrestrial laser scanner results supported by traditional land surveying techniques facilitates the determination of the vertical displacement of bridges with acceptable accuracy.
Journal Article
Tadeusz GargulaThe paper proposes a new method for adjusting classical terrestrial observations (total station) together with satellite (GNSS-Global Navigation Satellite Systems) vectors. All the observations are adjusted in a single common three-dimensional system of reference. The proposed method does not require the observations to be projected onto an ellipsoid or converted between reference systems. The adjustment process follows the transformation of a classical geodetic network (distances and horizontal and vertical angles) into a spatial linear (distance) network. This step facilitates easy integration with GNSS vectors when results are numerically processed. The paper offers detailed formulas for calculating pseudo-observations (spatial distances) from input terrestrial observations (horizontal and vertical angles, horizontal distances, height of instrument and height of target). The next stage was to set observation equations and transform them into a linear form (functional adjustment model of geodetic observations). A method was provided as well for determining the mean errors of the pseudo-observations, necessary to assess the accuracy of the values following the adjustment (point coordinates). The proposed algorithm was verified in practice whereby an integrated network made up of a GNSS vector network and a classical linear-angular network was adjusted.
1 May 2011 in Journal of Surveying Engineering
Journal Article
Tadeusz GargulaThe idea of integrated measurements, combining classic field observations and satellite observations, has recently been applied in geodetic work with increasing frequency. To draw an entire set of such observations numerically, it is necessary to reduce them to a common mathematical space (e.g., onto the surface of an ellipsoid WGS84). This paper presents a proposed adjustment of GPS observations in a local reference system without the necessity of transforming and mapping them. The adjustment process is carried out after a GPS vector network is transformed into a spatial angular-distance network. This allows an easy integration with classical observations (joint adjustment of all observations). Detailed formulas are provided and used to develop a mathematical adjustment model. The computational algorithm is verified in practice.
12 October 2024 in Applied Geomatics
Journal Article
Tadeusz GargulaThe research problem of the article is to devise a universal mathematical procedure for calculating point coordinates from typical planar surveying measurements. The proposed solution involves calculating the intersection points of two circles with radii equal to the measured distances (the distance-distance intersection problem). The author demonstrates a straightforward method for reducing every typical surveying problem to the distance-distance intersection form. The procedure also verifies the accuracy of the calculated coordinates. The derived equations were tested numerically using practical examples. The devised procedure will be integrated into an exhaustive numerical algorithm for diverse surveying problems regardless of the geometric approach during measurements.
26 June 2023 in Advances in Geodesy and Geoinformation
Journal Article
Tadeusz GargulaPelagia GawronekAbout Me
1988 – 1993: Higher education at the Agricultural University in Krakow, Faculty of Environmental Engineering and Land Surveying.
1993: MSc. Eng. degree of geodesy and cartography.
1998: PhD in the field of geodesy and cartography, Faculty of Spatial Planning and Surveying, University of Agriculture and Technology in Olsztyn.
2012: Postdoctoral degree in technical sciences, Faculty of Geodesy and Land Management, University of Warmia and Mazury in Olsztyn.
Employment:
1993-12-01 to present: University of Agriculture in Krakow: Krakow, PL,
2017 to 2020: Head of Department of Land Surveying.
Main directions of research activity: methods for the development of geodetic measurements, stationary and kinematic models of the observation adjustment, modular network technology, the issues of integrated network including conventional and GNSS (GPS) observations, the use of new technologies in the field of determining the displacement of objects, detection of gross errors in the observation adjustment process.
Articles: above 60 papers in such journals as e.g. Survey Review; Journal of Surveying Engineering; Sensors; International Journal of Geo-Information; Geodesy and Cartography (now: Advances in Geodesy and Geoinformation); Acta Scientiarum Polonorum; Vermessung Allgemeine Nachrichten; Geomatics, Landmanagement and Landscape; International Multidisciplinary Scientific GeoConference SGEM; Sensors; Applied Sciences; ISPRS International Journal of Geo-Information; Applied Geomatics