Zeljko Cvijetinovic | University of Belgrade (original) (raw)
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Papers by Zeljko Cvijetinovic
Remote Sensing
The inventory of woody vegetation is of great importance for good forest management. Advancements... more The inventory of woody vegetation is of great importance for good forest management. Advancements of remote sensing techniques have provided excellent tools for such purposes, reducing the required amount of time and labor, yet with high accuracy and the information richness. Sentinel-2 is one of the relatively new satellite missions, whose 13 spectral bands and short revisit time proved to be very useful when it comes to forest monitoring. In this study, the novel spatio-temporal classification framework for mapping woody vegetation from Sentinel-2 multitemporal data has been proposed. The used framework is based on the probability random forest classification, where temporal information is explicitly defined in the model. Because of this, several predictions are made for each pixel of the study area, which allow for specific spatio-temporal aggregation to be performed. The proposed methodology has been successfully applied for mapping eight potential forest and shrubby vegetation ...
Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with sys... more Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with systems for Automatic vehicle location (AVL). Well designed and implemented spatial data model for moving objects is one of the most significant elements of any AVL system. In practical applications the results of the latest scientific research are seldom applied, despite the fact that this area has been developing intensively for more than 20 years. The reasons for this are analysed in the paper. Short analysis of functionality of these systems is presented considering the impact of these functionalities on the implemented data model for moving objects and more specifically their impact on spatio-temporal component of the model. The paper especially reviews the possibility of using road networks as a basis for the representation of moving objects data models and a fact that these models are rarely used in practical applications. A solution overcoming this situation is proposed. The solutio...
Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with sys... more Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with systems for Automatic vehicle location (AVL). Well designed and implemented spatial data model for moving objects is one of the most significant elements of any AVL system. In practical applications the results of the latest scientific research are seldom applied, despite the fact that this area has been developing intensively for more than 20 years. The reasons for this are analysed in the paper. Short analysis of functionality of these systems is presented considering the impact of these functionalities on the implemented data model for moving objects and more specifically their impact on spatio-temporal component of the model. The paper especially reviews the possibility of using road networks as a basis for the representation of moving objects data models and a fact that these models are rarely used in practical applications. A solution overcoming this situation is proposed. The solutio...
3D cadastral systems are more complex than traditional cadastral systems and they require more co... more 3D cadastral systems are more complex than traditional cadastral systems and they require more complex technical solutions and innovative use of developing technologies. Regarding data integrity and data consistency, 3D cadastral data should be maintained by a Database Management System (DBMS). Furthermore, there are still challenges regarding visualization of 3D cadastral data. A prototype of the 3D cadastral system based on a NoSQL database and a JavaScript application for 3D visualization is designed and tested in order to investigate the possibilities of using new technical solutions. It is assumed that this approach, with further development, could be a good basis for the development of a modern 3D cadastral system. MongoDB database is used for storing data and Cesium JavaScript library is used for 3D visualization. The system uses an LADM (Land Administration Domain Model) based data model. Additionally, script languages, libraries, application programming interfaces (APIs), s...
Some limitation brought to us by cameras and imaging platforms sometimes can not be overcome as f... more Some limitation brought to us by cameras and imaging platforms sometimes can not be overcome as for the case of minimum airplane flight height used as platforms. In other case imaging of larger territories is often irrational, when it is performed from balloons or helicopters. So, there is an often need for combining different cameras and imaging platforms. New digital airborne cameras and non-metric high resolutions digital cameras expands our possibilities for combining this imaging source where we can get to optimal data source without disconcerting accuracy and unnecessary job build-up. In this paper the methodology of combining photogrammetric digital camera Z/I Imaging DMC and Canon EOS 5D will be presented as a source of data needed for photogrammetric product making of complex archaeological location with different photo resolutions.
New and redesigned version of Internet service MapsOfSerbia is presented in the paper. High quali... more New and redesigned version of Internet service MapsOfSerbia is presented in the paper. High quality data for the territory of Serbia cannot be found on worldwide existing services of similar category (Google Maps - GM, Microsoft Virtual Earth - VE, Yahoo Maps - YM). Territory of Serbia is mostly covered by small scaled satellite imagery (Landsat) and major roads network. There are also areas (around some larger cities and on few other locations) where imagery from Ikonos or Quickbird satellite missions is used. The reason for this situation is that large worldwide providers of vector datasets (TeleAtlas, Navteq and others) still do not have larger datasets for Serbian territory (for example, data for the capital city of Serbia, Belgrade). Satellite imagery in fine resolution is available only for areas and locations mentioned above and therefore leading dataset providers do not have significant amount of raster datasets (orthophoto) of Serbian territory in their archives as well. Th...
mapsoft.rs
Page 1. 1 LBS for Fleet Management - Status and Prospects in Serbia Milo Vojinović 1, eljko Cvi... more Page 1. 1 LBS for Fleet Management - Status and Prospects in Serbia Milo Vojinović 1, eljko Cvijetinović 1, Dragan Mihajlović 1, Nikola Kovačević 2 1 Faculty of Civil Engineering, University of Belgrade, Department for Geodesy ...
development
MobTrack:24 is a location based service that belongs to LBS applications for the tracking and man... more MobTrack:24 is a location based service that belongs to LBS applications for the tracking and management of fleet of vehicles. The design and the development of the first system version were done in 2008 and 2009. The system has been in commercial use since august 2008. During the last few years it has been established as one of the few leading services of this type in Serbia. The development of this system is a typical example of using the latest concepts and the best practices in the software development for this type of applications. Paper contains detailed description of the system and experiences gained during its development. Major problems and solutions are identified and described. Multi-tier architecture of the system is presented, as well as all the major software components and LBS components used. Software platform used for the development is described in detail with special attention paid to the components providing GIS functionalities of the system. Web services enabling system interoperability and integration with business and other information systems are covered too. Experiences gained during the system implementation and maintenance are also given in the paper.
Glasnik Sumarskog fakulteta, 2013
Survey Review, 2014
The subject of the research is the methodology for the successful production of the digital cadas... more The subject of the research is the methodology for the successful production of the digital cadastral map (DCM) database in a new spatial reference system (SRS) of Serbia. The DCM is treated as the basis for establishment of the coordinate based cadastre (CBC) in Serbia. The research is focused on the following: the status of the state survey data especially regarding analogue cadastral maps and state geodetic reference network, production of DCM database, the introduction of a new spatial reference system, and legislation covering this field in Serbia. The existing geodetic/surveying network for cadastral/topographic survey and analogue cadastral maps are analysed in terms of their quality. The research also covers an analysis of present methods and procedures for DCM production using data obtained from various sources. Coordinate differences for DCM points and differences between areas of polygon features obtained using original survey data and those obtained by digitising scanned cadastral maps are analysed. The procedure of legislating information letters and resolutions on changes of areas within the DCM production procedure and the impact of the transition from the Gauss-Krü ger to the UTM projection on areas for DCM polygon features are also analysed.
Paper presents procedures and experiences on using low cost desktop scanner Epson Expression 1640... more Paper presents procedures and experiences on using low cost desktop scanner Epson Expression 1640XL for orthophoto production. Complete process of scanning, scanner calibration and removal of systematic distortions of scanned images caused by scanner is developed and tested on several large projects of orthophoto production. Special, user -friendly software is developed for these purposes. The software includes algorithm for scanner calibration and estimation of distortions based on statistical analysis by using collocation (linear prediction). It is not expected and required from user to have any idea on the structure and distribution of scanner errors. These will be determined by the statistical analysis. Therefore, the software usage is not limited to any particular scanner or the type and nature of image distortions it introduces. Batch processing of scanned images is also supported with options for saving images in various formats and using several resampling types. The results...
Remote Sensing
The inventory of woody vegetation is of great importance for good forest management. Advancements... more The inventory of woody vegetation is of great importance for good forest management. Advancements of remote sensing techniques have provided excellent tools for such purposes, reducing the required amount of time and labor, yet with high accuracy and the information richness. Sentinel-2 is one of the relatively new satellite missions, whose 13 spectral bands and short revisit time proved to be very useful when it comes to forest monitoring. In this study, the novel spatio-temporal classification framework for mapping woody vegetation from Sentinel-2 multitemporal data has been proposed. The used framework is based on the probability random forest classification, where temporal information is explicitly defined in the model. Because of this, several predictions are made for each pixel of the study area, which allow for specific spatio-temporal aggregation to be performed. The proposed methodology has been successfully applied for mapping eight potential forest and shrubby vegetation ...
Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with sys... more Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with systems for Automatic vehicle location (AVL). Well designed and implemented spatial data model for moving objects is one of the most significant elements of any AVL system. In practical applications the results of the latest scientific research are seldom applied, despite the fact that this area has been developing intensively for more than 20 years. The reasons for this are analysed in the paper. Short analysis of functionality of these systems is presented considering the impact of these functionalities on the implemented data model for moving objects and more specifically their impact on spatio-temporal component of the model. The paper especially reviews the possibility of using road networks as a basis for the representation of moving objects data models and a fact that these models are rarely used in practical applications. A solution overcoming this situation is proposed. The solutio...
Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with sys... more Paper deals with the specific LBS scenario – Fleet management (FM) and more specifically with systems for Automatic vehicle location (AVL). Well designed and implemented spatial data model for moving objects is one of the most significant elements of any AVL system. In practical applications the results of the latest scientific research are seldom applied, despite the fact that this area has been developing intensively for more than 20 years. The reasons for this are analysed in the paper. Short analysis of functionality of these systems is presented considering the impact of these functionalities on the implemented data model for moving objects and more specifically their impact on spatio-temporal component of the model. The paper especially reviews the possibility of using road networks as a basis for the representation of moving objects data models and a fact that these models are rarely used in practical applications. A solution overcoming this situation is proposed. The solutio...
3D cadastral systems are more complex than traditional cadastral systems and they require more co... more 3D cadastral systems are more complex than traditional cadastral systems and they require more complex technical solutions and innovative use of developing technologies. Regarding data integrity and data consistency, 3D cadastral data should be maintained by a Database Management System (DBMS). Furthermore, there are still challenges regarding visualization of 3D cadastral data. A prototype of the 3D cadastral system based on a NoSQL database and a JavaScript application for 3D visualization is designed and tested in order to investigate the possibilities of using new technical solutions. It is assumed that this approach, with further development, could be a good basis for the development of a modern 3D cadastral system. MongoDB database is used for storing data and Cesium JavaScript library is used for 3D visualization. The system uses an LADM (Land Administration Domain Model) based data model. Additionally, script languages, libraries, application programming interfaces (APIs), s...
Some limitation brought to us by cameras and imaging platforms sometimes can not be overcome as f... more Some limitation brought to us by cameras and imaging platforms sometimes can not be overcome as for the case of minimum airplane flight height used as platforms. In other case imaging of larger territories is often irrational, when it is performed from balloons or helicopters. So, there is an often need for combining different cameras and imaging platforms. New digital airborne cameras and non-metric high resolutions digital cameras expands our possibilities for combining this imaging source where we can get to optimal data source without disconcerting accuracy and unnecessary job build-up. In this paper the methodology of combining photogrammetric digital camera Z/I Imaging DMC and Canon EOS 5D will be presented as a source of data needed for photogrammetric product making of complex archaeological location with different photo resolutions.
New and redesigned version of Internet service MapsOfSerbia is presented in the paper. High quali... more New and redesigned version of Internet service MapsOfSerbia is presented in the paper. High quality data for the territory of Serbia cannot be found on worldwide existing services of similar category (Google Maps - GM, Microsoft Virtual Earth - VE, Yahoo Maps - YM). Territory of Serbia is mostly covered by small scaled satellite imagery (Landsat) and major roads network. There are also areas (around some larger cities and on few other locations) where imagery from Ikonos or Quickbird satellite missions is used. The reason for this situation is that large worldwide providers of vector datasets (TeleAtlas, Navteq and others) still do not have larger datasets for Serbian territory (for example, data for the capital city of Serbia, Belgrade). Satellite imagery in fine resolution is available only for areas and locations mentioned above and therefore leading dataset providers do not have significant amount of raster datasets (orthophoto) of Serbian territory in their archives as well. Th...
mapsoft.rs
Page 1. 1 LBS for Fleet Management - Status and Prospects in Serbia Milo Vojinović 1, eljko Cvi... more Page 1. 1 LBS for Fleet Management - Status and Prospects in Serbia Milo Vojinović 1, eljko Cvijetinović 1, Dragan Mihajlović 1, Nikola Kovačević 2 1 Faculty of Civil Engineering, University of Belgrade, Department for Geodesy ...
development
MobTrack:24 is a location based service that belongs to LBS applications for the tracking and man... more MobTrack:24 is a location based service that belongs to LBS applications for the tracking and management of fleet of vehicles. The design and the development of the first system version were done in 2008 and 2009. The system has been in commercial use since august 2008. During the last few years it has been established as one of the few leading services of this type in Serbia. The development of this system is a typical example of using the latest concepts and the best practices in the software development for this type of applications. Paper contains detailed description of the system and experiences gained during its development. Major problems and solutions are identified and described. Multi-tier architecture of the system is presented, as well as all the major software components and LBS components used. Software platform used for the development is described in detail with special attention paid to the components providing GIS functionalities of the system. Web services enabling system interoperability and integration with business and other information systems are covered too. Experiences gained during the system implementation and maintenance are also given in the paper.
Glasnik Sumarskog fakulteta, 2013
Survey Review, 2014
The subject of the research is the methodology for the successful production of the digital cadas... more The subject of the research is the methodology for the successful production of the digital cadastral map (DCM) database in a new spatial reference system (SRS) of Serbia. The DCM is treated as the basis for establishment of the coordinate based cadastre (CBC) in Serbia. The research is focused on the following: the status of the state survey data especially regarding analogue cadastral maps and state geodetic reference network, production of DCM database, the introduction of a new spatial reference system, and legislation covering this field in Serbia. The existing geodetic/surveying network for cadastral/topographic survey and analogue cadastral maps are analysed in terms of their quality. The research also covers an analysis of present methods and procedures for DCM production using data obtained from various sources. Coordinate differences for DCM points and differences between areas of polygon features obtained using original survey data and those obtained by digitising scanned cadastral maps are analysed. The procedure of legislating information letters and resolutions on changes of areas within the DCM production procedure and the impact of the transition from the Gauss-Krü ger to the UTM projection on areas for DCM polygon features are also analysed.
Paper presents procedures and experiences on using low cost desktop scanner Epson Expression 1640... more Paper presents procedures and experiences on using low cost desktop scanner Epson Expression 1640XL for orthophoto production. Complete process of scanning, scanner calibration and removal of systematic distortions of scanned images caused by scanner is developed and tested on several large projects of orthophoto production. Special, user -friendly software is developed for these purposes. The software includes algorithm for scanner calibration and estimation of distortions based on statistical analysis by using collocation (linear prediction). It is not expected and required from user to have any idea on the structure and distribution of scanner errors. These will be determined by the statistical analysis. Therefore, the software usage is not limited to any particular scanner or the type and nature of image distortions it introduces. Batch processing of scanned images is also supported with options for saving images in various formats and using several resampling types. The results...