Aleksandar Ristic

University of Novi Sad · Department of Computing and Control Engineering

In this paper, existing point cloud processing algorithms are analyzed in order to monitor dams using terrestrial laser scanning. The introductory part describes the methodology of terrestrial laser scanning and the advantages that this method provides in relation to other acquisition methods of spatial data. In the following, existing algorithms a...

The utility network cadastre in Serbia is the main register of the utility lines and rights to them, together with the property owner's rights. The legal aspects of the utility network cadastre in Serbia is organized the same way like in real estate cadastre. For this reason, the extended LADM utility network data model for Serbia is developed in p...

Mapping underground infrastructure in Urban areas is an important technique for obtaining information about buried cables, such as electric and telephone cables, water and sewage pipes and other underground infrastructure. A special challenge is the detection of optical cables due to the material they are made of, the depth at which they are placed...

In this paper, the analysis of the dynamic load of the beam using geodetic and geotechnical sensors was performed. From the group of geodetic sensors, GPS/GNSS receivers were used, while from the group of geotechnical sensors, an accelerometer was used. The measurements were performed in laboratory conditions, and the experiment itself was designed...

With the expansion of urban areas, the supporting underground utility infrastructure is being developed. In certain situations, it’s characterized by exceptional density and complexity. For its efficient and planned management, it is of essence to know the location and position of individual objects, i.e. pipes. Out of many known methods for detect...

Technology development enabled real-time monitoring of terrain and artificial structures through the use of the systems comprised of geodetic and geotechnical sensors. Although the structure and the architecture of those systems can vary, they have many common features: automated measurements which provide monitoring and alarming when tolerances ar...

Technology development enabled real-time monitoring of terrain and artificial structures through the use of the systems comprised of geodetic and geotechnical sensors. Although the structure and the architecture of those systems can vary, they have many common features: automated measurements which provide monitoring and alarming when tolerances ar...

In this paper an application of GPR in the analysis of concrete structure is presented. Scanning is done as a part of preparation for mitigation works of dam ’Grančarevo’. The goal was to inspect existing small cracks and leakages. The dam is arc-shaped concrete dam with double curvatures. It is operational since 1968, and is situated 18km downstre...

Automated processing and extraction of useful information from GPR data is a complicated task, for which various approaches have been developed during the last years. This work examines the introduction of Canny edge detector as a new preliminary step of an advanced algorithm for automated hyperbola detection [1, 2]. The overall algorithm aims to i...

Scientists and experts participating in COST Actions can benefit from a wide range of COST networking tools. Meetings, workshops, conferences and training schools can be organized. Short-term scientific missions (STSM) can be funded: these are exchange visits where an Action Member spends five days up to six months abroad, in a host institution; th...

Ground Penetrating Radar (GPR) systems need to be calibrated on a recurrent basis and their performance shall be periodically verified, in accordance with manufacturer recommendations and specifications. Nevertheless, most GPR owners in Europe employ their radar units and antennas for years without ever having them verified by manufacturers, unless...

This paper presents a method for the automated detection and elimination of horizontal reflections from ground penetrating radar (GPR) profiles after Canny edge filtering. Horizontal reflections are generated by interfaces between different media parallel to the air-soil interface. The recognition of horizontal layers is a crucial task when the num...

This paper focuses on the use of the Canny edge detector as the first step of an advanced imaging algorithm for automated detection of hyperbolic reflections in ground-penetrating radar (GPR) data. Since the imaging algorithm aims to work in real time; particular attention is paid to its computational efficiency. Various alternative criteria are de...

This paper presents the results of a research study where ground penetrating radar (GPR) was successfully used to reveal the remains of the Württemberg-Stambol Gate in the subsurface of Republic Square, in Belgrade, Serbia. GPR investigations were carried out in the context of renovation works in the square, which involved rearranging traffic contr...

Photogrammetry and LiDAR are best-known technologies of mass data collection. In this research, comparison of two DEMs (Digital Elevation Models), created from data collected by LiDAR and photogrammetric technology, was done. In that way it was tried to analyze these two technologies and discuss about their advantages and disadvantages. Research ar...

The utility network cadastre in Serbia is the main register of utility lines and the rights to them. The Law on State Survey and Cadastre states the necessity for implementing a unified information system of both a real estate and utility network cadastre, but this has not been achieved in practice. The reasons for such a unified information system...

Canny edge detection is a multistage processing method that can be employed to detect edges in an image while suppressing noise. This edge detection operator was proposed by Canny in 1986 and is nowadays used for the real-time analysis of images in several application areas, including facial expression recognition, traffic management, tracking of u...

The communication strategy of researchers normally includes presentation of activities and results in scientific conferences and on peer-reviewed scientific journals. Nowadays there is a huge amount of research going on, on really important topics, that actually never really gets to policymakers, professional groups or commercialization; at the sam...

The aim of COST Action TU1208 was to share and increase scientific-technical knowledge and experience of Ground Penetrating Radar (GPR) techniques in civil engineering, whilst promoting a wider and more effective use of this safe and non-destructive method in the monitoring of structures. The COST Action TU1208 started in April 2013 and ended in Oc...

In recent years, GPR technology became an important technique in engineering practice as a tool for efficient detection, mapping and identification of underground utilities. Many countries recognized that and brought regulations for its use. One of the main tasks of the Working group 2: "GPR surveying of transport infrastructure, utilities and void...

In this paper results of a successful application of GPR technology to determine the exact location, dimensions and geometry of sub-surface archeological remains of a fortification object are presented. The object is the gate in the Square of Republic in Belgrade. Investigation was done as part of ongoing construction works in the Square, which als...

This abstract aims to offer a short overview of the main results achieved by COST Action TU1208 "Civil engineering applications of Ground Penetrating Radar" (www.GPRadar.eu, 2013-2017). More than 300 experts participated in the Action, from 150 institutions in 41 countries. In September 2014, TU1208 was praised among the running Actions in the TUD...

A multidisciplinary session entitled "COST Actions in Geosciences: breakthrough ideas, research activities and results" was successfully organized by Members of COST (European Cooperation in Science and Technology) Action TU1208 "Civil engineering applications of Ground Penetrating Radar" (www.gpradar.eu) within the 2018 edition of the European Geo...

Our participation in the COST (European Cooperation in Science and Technology) programme gave us significant insights into the importance of explaining scientific findings to non-scientific audiences. In the framework of COST Action TU1208 “Civil engineering applications of Ground Penetrating Radar” we organised a series of dissemination activities...

This paper presents a comparative study of two algorithms for detecting and analyzing the characteristic shapes of reflection obtained as a result of Ground-Penetrating Radar (GPR) scanning technology. The first algorithm is a sub-array processing method that uses direction-of-arrival algorithms and the matched filter technique; this approach is im...

Survey, establishment and maintenance of utility network in Serbia are defined by the Law on state survey and cadastre (2009), the Rulebook on survey and utility network cadastre (2010), the Manual for implementation and maintenance of the utility network digital database (2005) and the Law on the procedure for registration in the real estate cadas...

Deformation monitoring is very important task that surveyors are faced with. Many man-made structures like bridges, dams, high buildings, as well as parts of terrain such as landslides and rockfalls have to be monitored since they present a hazard that can cause material damage, environmental degradation and even human casualties. Many technologies...

Ground Penetrating Radar (GPR) systems shall be periodically calibrated and their performance verified, in accordance with the recommendations and specifications of the manufacturer. Nevertheless, most GPR owners in Europe employ their instrumentation for years without ever having it checked by the manufacturer, unless major flaws or problems becom...

Outcome of COST Action TU1208: A glossary of Ground Penetrating Radar terms in 15 languages spoken in COST Countries

The aim of the research presented in this paper is to analyze the benefits of integrating a mobile system capable of very fast, reliable and relatively inexpensive detection, identification and status examination of district heating network. Thermal imaging using unmanned aerial vehicle is used for pipeline route detection, inspection of validity o...

In this paper, we propose an automated detection algorithm for the localization of apexes and points on the prongs of hyperbolic reflection incurred as a result of GPR scanning technology. The objects of interest encompass cylindrical underground utilities that have a distinctive form of hyperbolic reflection in radargram. Algorithm involves applic...

This work aims at presenting the main results achieved by Working Group (WG) 2 “GPR surveying of pavements, bridges, tunnels and buildings; underground utility and void sensing” of the COST (European COoperation in Science and Technology) Action TU1208 “Civil Engineering Applications of Ground Penetrating Radar” (www.GPRadar.eu, www.cost.eu). The p...

Nowadays GPR technology is acknowledged as a reliable, fast, non-destructive remote sensing technology whose area of applications is wider every day. One of its most common applications is underground utility detection. Not only it is possible to detect the utility in the field, but using certain algorithms utilities which haven’t been detected in...

The study of vegetation cover, forests, orchards or vineyards and crops through satellite techniques is increasingly promoted as a result of facilities they offer. Since 2010 until today, it is launched over 50 satellite platforms, delivering images of the Earth's surface with different spectral, spatial and radiometric characteristics. New satelli...

In this paper a sensor network for automated deformation monitoring is presented. Such network has heterogeneous structure in terms of both hardware and data, and also has a wide area of applications: monitoring of bridges, dams, tunnels landslides etc. Most common sensors in such systems are geodetic, geotechnical and meteorological sensors, and t...

this paper presents various types of applications of geosensor networks in agriculture. Since the sensor technology has developed rapidly in recent years it led to emergence of systems which provide autonomous monitoring of environment – the geosensor networks. These networks have various areas of application, one of them being the agriculture. Usa...

Analysis of the application of modern remote sensing technologies in current research shows a significant increase in interest in fast and efficient detection of underground installations. The most important reasons of the said application are preventing damage during excavation works, as well as the formation of the cadastre of underground utiliti...

In this paper a new automated procedure for hyperbolic signatures detection and data extraction in radargrams is proposed. Radargrams are result of acquisition with GPR scanning technology. Most of underground utilities has cylindrical shape and is represented in radargrams by hyperbolic signatures. Resulting data from automated procedure are hyper...

Main objective of this study was to establish a relationship between land cover and land surface temperature (LST) in urban and rural areas. The research was conducted using Landsat, WorldView-2 (WV-2) and Digital Mapping Camera. Normalised difference vegetation index and normalised difference built-up index were used for establishing the relation...

In this paper, a general procedure for creation of georeferenced underground structure model is described. It consists of standardized survey procedures and a generalized data model. The dominant survey technology in this procedure is GPR scanning. Analysis of the procedure was done on specific areas of interest (AOI). The specific AOI, on which th...

This paper presents one of active remote sensing technology, based on the use of electromagnetic waves from the microwave frequency range - Ground Penetrating Radar scanning technology (GPR). GPR technology is classified as near surface sensor radar scanning technology. From the point of the usage of GPR technology, where the antenna is close to, o...

Area of Ground Penetrating Radar (GPR) technology applications becomes wider nowadays. It includes utility mapping as important part of civil engineering applications, geological structure and soil analyses, applications in agriculture, etc. Characteristics of the technology make it suitable for structure analysis of shallow landslides, whose numbe...

We present a procedure to estimate the characteristics of small shallow landslides based on the application of ground penetrating radar (GPR) and 2D electrical resistivity tomography (ERT). Existing procedures based on either conventional or non-invasive geophysical methods, observe almost exclusively large and deep landslides. Verification has bee...

This research aims to describe the analysis of geoinformation technologies and systems and its usage in detection of terrain slope with reference to timely detection and mapping sites with a high risk of slope movement and activation of landslides. Special attention is referred to the remote sensing technology and data acquisition. In addition to a...

This paper presents development of Geoportal for the Ministry of Environmental Protection of Serbia fully compliant with the standards in the field of geographic information systems (GIS) and spatial data infrastructure (SDI) principles whose aim is to promote interoperability of environmental geographic information systems and their integration in...

We present an methodology for a more detailed and less ambiguous spatial structure interpretation of small, shallow landslides. The spatial structure interpretation of this type of landslides bases on both underground and surface models and requires high-density data. This methodology involves the use of ground-penetrating radar (GPR), electrical r...

In certain applications in the field it is necessary to use GNSS, even though the field conditions are far from ideal. Even then GNSS survey shows much better performances in terms of usability and efficiency than other survey methods. One example of this application is represented in this paper. Here GNSS was used in mapping of hiking tracks in na...

In certain applications in the field it is necessary to use GNSS, even though the field conditions are far from ideal. Even then GNSS survey shows much better performances in terms of usability and efficiency than other survey methods. One example of this application is represented in this paper. Here GNSS was used in mapping of hiking tracks in na...

The main aim of this research is the development and implementation of a new, faster and more efficient method for data acquisition, processing and extraction of parameters which are necessary to model the state and structure of the slope processes. The application of new method provides easier access to data of the system for the reconstruction of...

This paper gives the short review of the Open Geospatial Consortium (OGC) metadata catalogue services that have the key role in geospatial resource discovery in Spatial Data Infrastructures (SDI). The notion of Spatial Data Infra-structure comprises a collection of technologies, policies and institutional agreements that provide an easier access to...

Considering the fact that current climate changes continuously increase the risk of flooding in most of the lowland areas enriched with water, the development of fast and efficient procedures for acquisition, processing and visualization of geospatial data is vital. The main subject of discussion in this paper was the improvement of standard and ad...

As the rapid adoption of new technologies for landslide and rock slope engineering continues - the natural evolution of equipement for landslide mapping and monitoring has started. The technological evolution of LIDAR (Light Detection And Ranging) system creates the potential for automated remote collection of accurate, high resolution data and rep...

This paper presents the status and perspective of operative Global Navigation Satellite Systems (GNSS): Global Positioning System (GPS), developed in United States; Global'naja Navigacionnaja Sputnikovaja Sistema (GLONASS), developed in Russia; GALILEO system, which is under developing by European Union and Chinese COMPASS system. The analysis of r...

This paper presents the active remote sensing technology, based on the use of electromagnetic waves from the microwave frequency range. According to sensor distance from the surface soil layer, two existing radar technologies were analyzed: Synthetic Aperture Radar (SAR) and Ground Penetrating Radar technology (GPR). Considering the fact that the S...

Landslide analysis becomes more complex and practically more useful by use of new technologies. Using the fast, accurate and non-invasive technologies gives more information which results in better analysis. The proposed procedure is based on combination of the next new technologies: Ground Penetrating Radar (GPR), terrestrial laser scanning and Gl...

Since the attention of danger from the floods grows every year, protection, especially in low terrain, gets more important. Therefore flooding bank analysis and their maintenance becomes very significant for most of European countries. Application of various new technologies can be very useful for those purposes. This paper describes an application...

We present a new method to simultaneously estimate cylindrical object radius (R) and electromagnetic (EM) wave propagation velocity (v) from ground penetrating radar (GPR) data. R estimation methods have been investigated since the middle of the previous decade, but studies have become more intensive and important over the last several years since...

No dig utility mapping technology is important in data acquisition for computation, modelling and control of modern underground infrastructure systems. Today, the development and realisation of new pipelines and cables in urban environment are significantly faster than conventional methods of utility mapping. Classic technology based on excavation,...

We present an application for more complete characterization of flooding banks, by simultaneous estimation of cylindrical object radius (R) and electromagnetic (EM) wave propagation velocity (v) from Ground Penetrating Radar (GPR) data. Since v estimation accuracy is higher than existing measuring methods can provide, measuring error influence on a...

This paper describes principles and one application of new technology for underground water flows detection in shallow subsurface layers (0-10m), from Ground Penetrating Radar (GPR) data. Technology was applied on flooding bank in Novi Sad, Serbia on location „Špic” which is part of a river island. Analysis included erosion of the flooding bank dur...

A goal of this work is to define the structure of geographic information for gas line network in Serbia. In accordance with this, existing model solutions (among them solution given by Republic Geodetic Authority of Serbia) were analyzed and also their accordance to GIS (Geographic Information System) standards and regulations. The whole GIS data m...

This paper describes modern, non-invasive data acquisition methods of underground utility detection. Basic parameters, methods and their influence on the acquisition speed and data quality are defined. This data can be used for development of complex Geographic Information Systems. The aim of this paper is to show data extraction from the hyperboli...

This paper describes modern, non-invasive data acquisition methods in underground utility detection. The work presents the possibilities of connecting data acquired with a Ground Penetrating Radar (GPR) with GPS (Global Positioning System) data and the joint use of these technologies through various examples. Also, the basic parameters, methods and...

U radu je obrazložen princip i jedna primena nove tehnologije detekcije podzemnih voda i tokova u podpovršinskom sloju 0-10m Georadarom. Neposredna realizacija metode je izvršena na lokaciji "Špic" na Ribarskom ostrvu u Novom Sadu za proces iznošenja materijala iz propusnog sloja nasipa prilikom nadolaženja ili povlaenja vode, odnosno promene nivoa...

This paper describes modern, non-invasive data acquisition methods for underground utility detection. The work presents the possibilities of connecting data acquired with a Ground Penetrating Radar (GPR) with GPS data and the joint use of these technologies in the mapping of underground mid-pressure gas line network. The aim of this paper is to sho...

The basic characteristic of a specific drainage structure of ash depots in large steam power plants is the multilevel structure with several covered drainage systems. The central element of every drainage system is the shaft that collects all water from ash and hot water mixture arriving from the plant. The ash-covered shafts with unknown position...

This paper describes modern, non-invasive data acquisition methods in underground utility detection. The work presents the possibilities of connecting data acquired with a Ground Penetrating Radar (GPR) with GPS (Global Positioning System) data and the joint use of these technologies in the mapping of underground mid-pressure gas line network. Also...

This paper describes modern, non-invasive data acquisition methods in underground utility detection. The work presents the possibilities of connecting data acquired with a Ground Penetrating Radar (GPR) with GPS data and the joint use of these technologies in the mapping of underground mid-pressure gas line network. The aim of this paper is to show...

This paper describes modern, non-invasive data acquisition methods in underground utility detection. The work presents the possibilities of connecting data acquired with a Ground Penetrating Radar with GPS data. Also, the basic parameters, methods and their influence on the acquisition speed and data quality are defined.