<abstract xmlns="http://www.w3.org/1999/xhtml">Absolute horizontal displacements are an important element of dam safety level assessment. Appropriate design of measurement network is a prerequisite for the acquisition of displacement values that meet the reliability requirements. A network of this kind, apart from ensuring the required precision of displacement determination, should be characterised by reliability allowing for elimination of gross errors in the results of geodetic surveys. This study aims to propose a method to improve reliability characteristic of surveying network used for horizontal displacement identification in Zatonie dam. The desired effect (increase in the network’s reliability) is obtained by the authors in two stages. The first stage concerns expansion of the existing network by addition of three free stations. As the obtained effect did not prove to be satisfactory, in the second stage so called observation accuracy harmonisation was carried out, which optimally utilises the reliability potential of the measurement construction. In order to successfully carry out the harmonisation, a modification to the procedure’s algorithm had to be introduced. A design of a network ensuring detection of a gross error in any given observation was obtained as the result of the performed actions.</abstract>

Control network reliability reconstruction for Zatonie dam

<abstract xmlns="http://www.w3.org/1999/xhtml">The paper presents an analysis of the influence of multiannual coal exploitation on the church situated in Bytom–Miechowice. The objects has been monitored for many years by classic measurement methods as well as by the laser scanner. The measurements performed in 2015 allowed for a comprehensive analysis of the geometrical state of the construction. Laser scanning method enabled creating a model of the current state of the building and comparing with theoretical dimensions and dependents. The article focuses on the specific of conducting spatial analysis, which must take into account not only geometry of the construction, but also the kinematics of terrain deformations as well.</abstract>

The influence of mining activities on the Church of St. Cross in Bytom-Miechowice

<abstract xmlns="http://www.w3.org/1999/xhtml">In geodetic measurements of deformations in shell cooling towers, an important factor is to optimize the number of points representing the exterior surface of the shell. The conducted analyses of damage to such structures proved that cooling towers exhibited shell deformation consisting of irregular vertical waves (three concavities and two convexities), as well as seven horizontal waves. On this basis, it is claimed that, in accordance with the Shannon theorem, the correct representation of the generated waves requires the measurement of the cooling tower shell in a minimum of 12 vertical and 14 horizontal sections. Such density of the points may not be sufficient to represent local imperfections of the shell. The article presents the results of test measurements and their analysis, which were conducted to verify the assumptions as to the optimal number of measurement points for the shell of a cooling tower. The evaluation was based on a comparative analysis of the data obtained by the Terrestrial Laser Scanning (TLS) method, creating a very detailed model of geometric imperfections in an actual cooling tower with a height of 100 m. Based on the data obtained by the TLS method, point grids of various density were generated. An additional measurement of the cooling tower shell deformation was performed using a precise electronic total station with reflectorless measurement option. Therefore, it was possible to assess the accuracy of measurements by laser scanning in relation to measurements obtained by reflectorless total stations.</abstract>

Department of Engineering Surveying and Civil Engineering, Faculty of Mining Surveying and Environmental Engineering

Faculty of Physics and Applied Computer Science

Measurement point density and measurement methods in determining the geometric imperfections of shell surfaces

<abstract xmlns="http://www.w3.org/1999/xhtml">Usable floor area is one of the most important spatial attributes of buildings and premises. It is used, for example, to determine the basis for their taxation. Unfortunately, the question of proper determination of usable floor area in Poland has remained problematic for many years, which is closely related to the occurrence of various definitions of usable floor area in the currently binding legal acts. Consequently, usable floor area is not a universal attribute. This means that in certain cases significant discrepancies may occur between the usable floor area of the same structure, determined for different purposes. In addition, despite attempts made to unify the principles for the performance of surveys of building structures and their parts, this requirement still can not be recognized as fully met. Therefore, there is no doubt that the problem of reliability and availability of data defining the usable floor area of buildings is becoming even more important in view of the introduction of the ‘ad valorem’ tax, which has been planned for years. For this reason, this paper proposes a universal, multi-variant method of estimating usable floor area based on geometric and descriptive data of buildings contained in the cadastre. The Authors, taking into account the applicable legal regulations, have considered the possibilities of practical implementation of individual variants of this specific method. They have carried out empirical tests of effectiveness of the proposed approach. They have also defined tasks for which this method of determining the usable floor area of buildings would be particularly useful.</abstract>

The concept of estimating usable floor area of buildings based on cadastral data

<abstract xmlns="http://www.w3.org/1999/xhtml">The provisions of the geodetic law contain the term “Structures permanently attached to buildings”. These are elements that make up a set of attributes of buildings. At present, attributes of buildings are very complex, giving rise to discussion in the surveying environment. Many of them are impossible to be unambiguously and immediately defined by the surveyor. The surveyor is obliged to identify structures permanently attached to buildings, to define them, and to enter these structures with all their attributes into appropriate databases.This research paper presents the analysis consisting of certain aspects related to an attempt to define these attributes and to determine the principles of assigning their definitions to construction realities. For this purpose, the legal regulations and case-law concerning the studied attributes were referred to. Then, symbolic representation for the presented structures was analysed, as regards its use on geodetic maps. An important element influencing the introduced changes was identified, which is a sign of the times, i.e. digitization of the geodetic and cartographic documentation database. Finally, the Author proposed what changes should be made with respect to the amount of the information collected on structures permanently attached to buildings, as well as to the methods of their presentation on maps.</abstract>

Principles of defining and recording data on structures permanently attached to buildings and their influence on coherence of cadastral data on buildings in Poland

<abstract xmlns="http://www.w3.org/1999/xhtml">Appropriate precision and low cost are the basic conditions that have to be fulfilled by a project of a geodetic network. Reliability, translating into the ability to detect gross errors in the observations and higher certainty of the obtained point position, is an important network characteristic. The principal way to provide appropriate network reliability is to acquire a suitably large number of redundant observations. Optimisation of the observation accuracy harmonisation procedure allowing for the acquisition of an appropriate level of reliability through modification of the observation a priori standard deviations is the focus of this study. Parameterisation of the accuracy harmonisation is proposed. Furthermore, the influence of the individual parameter operation on the effectiveness of the harmonisation procedure is tested. Based on the results of the tests an optimal set of harmonisation parameters which guarantees the maximal efficiency of the harmonisation algorithm is proposed.</abstract>

Adjustment of observation accuracy harmonisation parameters in optimising the network’s reliability

Obituary: Marcin Barlik (1944-2018)

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Reports on Geodesy and Geoinformatics

 Reports on Geodesy and Geoinformatics (formerly Reports on Geodesy) is recognized as a semi-annual scientific journal that has appeared since 1991. The volumes of this journal had been prepared and edited by the staff of the Institute of Geodesy and Geodetic Astronomy until 2008 and then during the reorganization of the Faculty of Geodesy and Cartography between years 2008-2011 the volumes were edited and printed by the scientists of the Department of Geodesy and Geodetic Astronomy of Warsaw University of Technology (WUT). Since 2012 the journal has been edited by the scientific staff of the Faculty of Geodesy and Cartography of WUT.  Each paper submitted for publishing in Reports on Geodesy and Geoinformatics is peer-reviewed. The list of our revisers contains more than 200 scientists both from Poland as well as from other countries. Our revisers are recognized specialists from different branches of geodesy and cartography. 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Aims and ScopeReports on Geodesy and Geoinformatics in keeping with tradition, is intent on presenting the whole of technological and scientific progress taking place in modern geodesy and cartography, where research and implementation of geoinformatic character play an exceptionally important role in accelerating the development of our discipline. It is for this reason that we have decided to expand the journal’s formula so as to encourage a broader group of scientists and specialists in the realms of geodesy, computer science, cartography, photogrammetry, remote sensing, geography, geology, and related sciences who are developing new methods and technologies of geovisualization and are involved in the modeling of space applying GIS technology to collaborate with us. At the same time, the journal’s profile shall maintain the importance of other theoretical, industrial, and development research in the areas of theoretical geodesy, geodetic astronomy, navigation, and studies on displacements and the classic problems facing geodesic surveying.  Journal PoliciesThe journal provides its’ policies, which include detailed information about submission, editorial and publishing processes and guidelines for authors and reviewers. All parties are being introduced with their rights and responsibilities to ensure smooth and ethical publishing process. Visit following subsections for more details on each policy:    Publication Ethics and Publication Malpractice Statement  Open Access  Privacy Statement   Reports on Geodesy and Geoinformatics (formerly Reports on Geodesy) in keeping with tradition, is intent on presenting the whole of technological and scientific progress taking place in modern geodesy and cartography, where research and implementation of geoinformatic character play an exceptionally important role in accelerating the development of our discipline. It is for this reason that we have decided to expand the journal's formula so as to encourage a broader group of scientists and specialists in the realms of geodesy, computer science, cartography, photogrammetry, remote sensing, geography, geology, and related sciences who are developing new methods and technologies of geovisualization and are involved in the modeling of space applying GIS technology to collaborate with us. At the same time, the journal's profile shall maintain the importance of other theoretical, industrial, and development research in the areas of theoretical geodesy, geodetic astronomy, navigation, and studies on displacements and the classic problems facing geodesic surveying.Internet access to complete articles in an "open access" formula will significantly facilitate use by those who are interested as well as expand the circle of readers.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 

Reports on Geodesy and Geoinformatics

Volume 105 (2018): Issue 1 (June 2018)

Original Article