Zoltan Siki

Zoltan Siki
Budapest University of Technology and Economics · Department of Geodesy and Surveying

About

28
Publications
7,583
Reads
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44
Citations
Introduction
Robotic land surveying systems(SLAM) based on open source software and various sensors. Processing of observed data, adjustment calculation.
Additional affiliations
September 1986 - present
Budapest University of Technology and Economics
Position
  • Senior Lecturer
Education
September 1991 - May 1996
Budapest University of Technology and Economics
Field of study
  • Micro traffic simulation and environmental effect modelled in GIS
September 1984 - May 1986
Budapest University of Technology and Economics
Field of study
  • Engineering mathematics
September 1978 - June 1983
Budapest University of Technology and Economics
Field of study
  • Civil Engineer specialized for Geodesy

Publications

Publications (28)
Presentation
Full-text available
A new small open-source project is introduced in this presentation. The Find-GCP project can be used to automatize the measurement of the Ground Control Points (GCP) coordinates on images. It can be used in close photogrammetry tasks. The markers and their unique IDs are detected on the the photos using the ArUco open-source library which is part o...
Presentation
Full-text available
The quality control, maintenance, and renewal of land registry maps have always been priorities in the surveying profession. Many countries worldwide must face the issue that a significant part of their current digital land registry maps are based on old analogue maps that were digitised without involving any in-situ measurements. A direct conseque...
Article
Full-text available
The quality control, maintenance, and renewal of land registry maps have always been priorities in the surveying profession. Many countries worldwide must face the issue that a significant part of their current digital land registry maps are based on old analogue maps that were digitised without involving any in-situ measurements. A direct conseque...
Article
The quality control, maintenance, and renewal of land registry maps have always been priorities in the surveying profession. Many countries worldwide must face the issue that a significant part of their current digital land registry maps are based on old analogue maps that were digitized without involving any in-situ measurements. A direct conseque...
Article
Full-text available
In geodetic movement and deformation analysis, a novel application of photogrammetry is presented in this article. The resolution of the images is increased by inserting a geodetic telescope in front of the camera. Raspberry Pi computer and camera are used to take photos and videos. Extending the open-source Ulyxes system, image processing was full...
Preprint
Full-text available
A step by step tutorial for the open source software GeoEasy. Based on the delivered demo data with the installer, a detailed description with practical examples is given about the main features of the surveying calculations supported by GeoEasy.
Article
Full-text available
Photogrammetry is experiencing its renaissance in the 21st century. The main driving forces are research in computer vision as well as drone (UAV/UAS/RPAS) technology. There are popular open-source libraries and applications available in these fields (e.g. OpenCV and ODM). In this paper, we report our experiments using OpenCV in specific land surve...
Article
Full-text available
In geoinformatics, there is a considerable demand for dealing with different layers given in different geodetic datums and map projections within the same project. In the majority of the software, the computations are completed on-the-fly using the open-source program PROJ. In recent years, the definition of national reference systems for a wide ra...
Article
Full-text available
After briefly reviewing state-of-art processing techniques used in photogrammetry, four open source and three commercial software are briefly introduced. We created point clouds with each software from the images taken at five different locations, summarizing the elapsed time and the size of the generated point clouds in a comparative table. Based...
Poster
Full-text available
Introduction to OSGeo, structure, activies, ...
Poster
Full-text available
Introduction to open source land surveying software version 3.1. O. Objectives and most important functionalities are presented.
Presentation
Full-text available
Ulyxes is an open source project (http://www.agt.bme.hu/ulyxes/) to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant c...
Preprint
Ulyxes is an open source project to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant coffee: three in one (coffee, sug...
Preprint
Full-text available
Ulyxes is an open source project to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant coffee: three in one (coffee, sug...
Article
Ulyxes is an open source project to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant coffee: three in one (coffee, sug...
Article
Full-text available
The development of the GeoEasy program started in 1997. Twenty years later in 2017 it became free software under GPL license, version 3.0.0 is freely available for everybody. The core development of GeoEasy is made on Linux operating system, using Tcl/Tk script language, thanks to the Tcl/Tk ports to other operating systems, the program can be run...
Article
Full-text available
System integrity (i.e. the capability of self-monitoring) and the reliability of the positions provided need to be ensured within all safety critical applications of the GPS technology. For the sake of such applications, GPS augmentations, for example Space Based Augmentation Systems (SBAS) are to be applied to achieve the required level of integri...
Article
This paper presents an Environmental Risk Management (ERM) approach employed in the Toka catchment, Gyöngyösoroszi, which is an abandoned Lead and Zinc sulphide ore mining site in Hungary. Mine closure and remediation works are currently in progress in the area. The ERM is focussed on both the point and diffuse pollution sources. The paper refers s...
Article
A GIS-based (geographical information system) quantitative hazard- and risk-assessment methodology was implemented within an environmental risk management approach to quantify metal emissions and environmental risk from point and diffuse pollution sources in an abandoned base-metal sulfidic-ore-mining area of the Toka Creek watershed, in Gyöngyö so...
Article
A three tiered, iterative Environmental Risk Assessment methodology, including preliminary Qualitative Risk Assessment, Quantitative Hazard Assessment and Site Specific Quantitative Risk Assessment, was established to assess the environmental risk of point and diffuse pollution of mining origin at catchment scale [1]. The model site was an abandone...
Article
An Environmental Risk Management methodology was developed for the Toka catchment area, an abandoned base metal mining site in Gyöngyösoroszi, Hungary. The postmining activities on the Hungarian site require the management of both the point and diffuse sources. The mobile Cd and Zn content of the mine waste, soil and sediment transported by water p...
Article
Full-text available
The Toka catchment area, a former base metal mining site in Gyöngyösoroszi, Hungary, was selected to demonstrate the adaptation potential of the Difpolmine approach applied to diffuse pollution of mining origin at the Salsigne (France) site. The postmining activities at the Hungarian site require the management of both the point and diffuse sources...
Conference Paper
Due to the heavy traffic, people living in urban areas have to get used to congested roads, increased traveling time, and stressful situations. There is a strong demand on acquiring real-time flow data on actual traffic and road conditions. Our paper presents a method on acquiring several traffic data from different data sources, such as induction...
Article
Full-text available
The present situation in Hungary in the field of GIS data exchange is introduced in this paper. Most of the data exchanges concentrate on map data (graphical data) without attributes. The new Hungarian standard DAT1 (MSz 7772-1) has changed the situation. It involves map, topology and attribute data as well and is the official data exchange format...
Article
Geometric models for solids under the surface of the Earth are discussed in this paper. We have developed a two and a half dimensional model and program for geologic applications. We introduce a conceptual scheme for the full 3D geometric model as well.
Article
Full-text available
A complex risk management methodology was worked out to point and diffuse pollution by mining waste at a former mining site in North-East Hungary. The risk management methodology is based on an integrated conceptual risk model, a tiered GIS-based catchment scale risk assessment and on risk reduction by combined chemical-and phytostabilisation. Risk...

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Project (1)