Identification of pseudo-nodal points on the basis precise leveling campaigns data and GNSS

Bednarczyk, Michał

doi:10.13168/agg.2017.0028

Cited by 5 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Connecting nodes have to be identified to link several independent networks of vertical movements. A solution to this problem was proposed by [20]. An analysis of unadjusted vertical movement changes on selected leveling lines used to estimate the maximum distance between nodal points and GNSS permanent stations was conducted.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Vertical Movements of the Earth’s Crust in Poland with the Co-Kriging Method Based on Various Sources of Data

Kowalczyk

Chojka

2020

Applied Sciences

View full text Add to dashboard Cite

The main aim of this study was to evaluate the applicability of the co-kriging method for modeling the vertical movements of the Earth’s crust based on data acquired with the use of precision leveling techniques and measurements conducted by permanent Global Navigation Satellite System (GNSS) stations. Data were processed with the use of empirical, theoretical, and directional variograms (semivariograms), as well as variogram maps. Large-scale spatial variability was determined using polynomial regression. The relationships between the length of the semi-major and semi-minor axes vs. the root mean square (RMS) and the standard error of the estimate were analyzed. The relationships between the anisotropic direction and the number of lags were determined, and other parameters were calculated. Preliminary data fitting produced non-stationary surfaces. The leveling data were anisotropic, and the GNSS data were isotropic. Nugget effects were observed in both datasets, in particular in the GNSS data. The size of the ellipse was strongly correlated with the RMS and σ (average standard deviation of prediction). The anisotropy angle was determined using the number of lags. Co-kriging was found to not be a suitable method for modeling the vertical movements of the Earth’s crust based on data from various sources. The final result was strongly influenced by the initial dataset. The obtained results show how the method of combining data sets (interpolation, network adjustment) affected the final cartographic model.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling of the Vertical Movements of the Earth’s Crust in Poland with the Co-Kriging Method Based on Various Sources of Data

Kowalczyk

Chojka

2020

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…no centers in the network structure -the network is very sensitive to the deliberate exclusion of centers from the network structure an attack on several centers can lead to complete network disruption and structural dysfunction rarely appear in the real world -they characterize many spatial structures and are versatile in usage Source: Own analysis based on [6,28,39].…”

Section: Random Network Scale-free Networkmentioning

confidence: 99%

Development of the Theory of Six Value Aggregation Paths in Network Modeling for Spatial Analyses

Kowalczyk¹,

Bajerowski²

2020

IJGI

View full text Add to dashboard Cite

The dynamic development of spatial structures entails looking for new methods of spatial analysis. The aim of this article is to develop a new theory of space modeling of network structures according to six value aggregation paths: minimum and maximum value difference, minimum and maximum value decrease, and minimum and maximum value increase. The authors show how values presenting (describing) various phenomena or states in urban space can be designed as network structures. The dynamic development of spatial structures entails looking for new methods of spatial analysis. This study analyzes these networks in terms of their nature: random or scale-free. The results show that the paths of minimum and maximum value differences reveal one stage of the aggregation of those values. They generate many small network structures with a random nature. Next four value aggregation paths lead to the emergence of several levels of value aggregation and to the creation of scale-free hierarchical network structures. The models developed according to described theory present the quality of urban areas in various versions. The theory of six paths of value combination includes new measuring tools and methods which can impact quality of life and minimize costs of bad designs or space destructions. They are the proper tools for the sustainable development of urban areas.

show abstract

“…As an example he took two permanent ASG-EUPOS stations corelating the time series of height and temperature concluding that the influence of thermal expansion of materials holding the GNSS antenna on the estimated vertical crustal movements between the stations are of 0.1 mm/yr magnitude. Finally, Bednarczyk et al (2018) solved the problem of identification of fiducial point in the subsequent levelling campaigns (precise and GNSS) by providing coherent database containing attributes of both types of data and automatization of the joint point identification process. They presented the results of such identification process, depending on the amount of data, on the example of the area of Poland.…”

Section: Study On Local and Regional Dynamics Using Permanent Observa...mentioning

confidence: 99%

Geodesy and Cartography

Bogusz

Brzeziński

Nastula

2019

View full text Add to dashboard Cite

This paper summarizes the activity of the chosen Polish geodetic research teams in 2015-2018 in the fields of Earth: rotation, dynamics as well as magnetic field. It has been prepared for the needs of the presentation on the 27 th International Union of Geodesy and Geodynamics General Assembly, Montreal, Canada. The part concerning Earth rotation is mostly focused on the use of modelling of diurnal and subdiurnal components of Earth rotation by including low frequency components of polar motion and UT1 in the analysis, study of free oscillations in Earth rotation derived from both space-geodetic observations of polar motion and the time variation of the second degree gravitational field coefficients derived from Satellite Laser Ranging (SLR) and Gravity Recovery and Climate Experiment (GRACE) observations, new methods of monitoring of Earth rotation, as well as studies on applications of the Ring Laser Gyroscope (RLG) for direct and continuous measurements of changes in Earth rotation and investigations of the hydrological excitation of polar motion. Much attention was devoted to the GRACE-derived gravity for explaining the influence of surface mass redistributions on polar motion. Monitoring of the geodynamical phenomena is divided into study on local and regional dynamics using permanent observations, investigation on tidal phenomena, as well as research on hydrological processes and sea level variation parts. Finally, the recent research conducted by Polish scientists on the Earth's magnetic field is described.

show abstract

Identification of pseudo-nodal points on the basis precise leveling campaigns data and GNSS

Cited by 5 publications

References 22 publications

Modeling of the Vertical Movements of the Earth’s Crust in Poland with the Co-Kriging Method Based on Various Sources of Data

Modeling of the Vertical Movements of the Earth’s Crust in Poland with the Co-Kriging Method Based on Various Sources of Data

Development of the Theory of Six Value Aggregation Paths in Network Modeling for Spatial Analyses

Geodesy and Cartography

Contact Info

Product

Resources

About