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Auflistung nach Autor:in "Ruzic, Ivica"

1 - 9 von 9
  • Konferenzbeitrag
    A Method for High Precision Coordinate Transformation in Environmental GIS Applications
    (Environmental Informatics and Systems Research, 2007) Ruzic, Ivica; Pecar-Ilic, Jadranka
    Development of a method for coordinate system transformations, which can be used within GIS applications for envi- ronmental information management, is described. Transformation of geographic (in degrees) into geodetic (in m) coor- dinates was investigated using the old Yugoslav coordinate system (still in use in the newly established states of Slo- venia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro and Macedonia) as source data, with precision of cm. To simplify the transformation procedure, the general polynomial coordinate transformation was used, organized in several steps. First, an equation of the third order for interpolation of northing coordinates along a central meridian, as a function of latitude, was developed using a central difference scheme. Using the results obtained in such a way equa- tions of second and fourth orders were developed for calculation of the increase in northing and shifts of easting from false easting, as a function of longitude (for a distance of 2o from the central meridian) along the corresponding paral- lel. Interpolation by 1o resulted in errors up to 5 cm, while interpolation by 30' resulted in errors below 1 cm, which corresponds to the precision of original source data. Interpolation by 15' or less cannot further increase the accuracy. Quadratic terms (about 485m/o) are dominant in equations for the increase in northing and linear terms (about 80000m/o) are dominant in those for the shift in easting, while other terms are in the range of centimetres or less.
  • Konferenzbeitrag
    Application of GIS and Web Technologies for Danube Waterway Data Management in Croatia
    (Informatics for Environmental Protection - Networking Environmental Information, 2005) Pecar-Ilic, Jadranka; Ruzic, Ivica
    The paper gives a general description of the Danube waterway data management in Croatia. For this purpose, we initiated the development of a specialized geographic information system (GIS), the so called River IS, which provides efficient waterway related data management for the Croatian part of the Danube River. In addition, Croatian activities in the Pan-European Programme Consortium Operational Management Platform River Information Services (COMPRIS) and INTERREG project Data Warehouse for the Danube Waterway (D4D) are described. Greatest emphasis is placed on our research how to solve the major problems identified by “GIS Forum Danube” expert groups. We present our solutions to two important D4D project objectives. The first project objective concerns preparation of national GIS data of the participating countries in the world geodetic WGS84 coordinates as well as checking the transnational compatibility of GIS data. The second important project objective concerns development of a commonly agreed catalogue of object types and their attributes necessary to describe waterway related data. For example, the conversion of the Croatian national geographic data into Inland ECDIS digital navigation maps is described.
  • Konferenzbeitrag
    Architecture of River Information System with Automatic XML Processing
    (The Information Society and Enlargement of the European Union, 2003) Bec, Sonja; Pecar-Ilic, Jadranka; Ruzic, Ivica
    In this paper the River Information System architecture is formally described at the highest level by the standard Unified Modeling Language (UML). UML package diagram, which represents necessary packages (subsystems) and their mutual communication, was created. Based on that description the detailed Object Oriented (OO) development of each subsystem can be performed later. Here we propose a solution using eXtensible Markup Language (XML) as the format of exchanged data. The example of the automatic eXtensible Markup Language (XML) processing is described as well. These activities are a part of the CRORIS programme carried out by the Rudjer Boskovic Institute and the Ministry of Maritime Affairs, Transport and Communications of the Republic of Croatia.
  • Konferenzbeitrag
    Dynamic Web Application for Temporal and Spatial Presentation of Environmental Data
    (Sustainability in the Information Society, 2001) Pecar-Ilic, Jadranka; Ruzic, Ivica
    This paper present the main advantages of the Specialized Information System based on integration ofGIS(Geographic Information Systems) and the database thus enabling efficient temporal and spatial presentations of environmental water related data. The most important parts of the dynamic Web application development process are brought out , applying the modern object-oriented(00)approach and technologies. Dynamic Webapplication provides timely availability of relevant data to authorized users. This application enables automatic generation of various report types (such as maps, time series diagrams, tables, etc.), as well as generation of thematic maps based on built-in knowledge and user queries. The verification of this system has been performed using the data from EPDRB (Environmental Programme for the Danube River Basin) in which we have actively participated.
  • Konferenzbeitrag
    Extension of Coding CEVNI Signs and Marking for European Waterways
    (Environmental Informatics and Industrial Ecology, 2008) Ruzic, Ivica; Pecar-Ilic, Jadranka; Redly, Laszlo
    This paper presents a new method of coding for signs and marking, which is based on the extension of signs and marking described in Annexes 7 and 8 of the European Code for Inland Waterways (CEVNI). Being members of three European expert groups, we have proposed these new codes of waterway signs and marking and recommend them for cases where they can be efficiently used. The main goal is to enable the use of these codes in databases, GIS systems and Web applications for efficient maintenance of waterway information. In addition, they will also contribute to international data exchange for creating standardised electronic messages described by ERI and NtS working groups. The intention is not to amend the existing coding from the Inland ECDIS Standard, which was developed for creation of Electronic Navigation Charts (ENCs). For example, the use of these new codes is tested through the Web GIS application for presentation of inland waterway signs and marking on the Danube River in Croatia. The application examples concern automatically generated reports on the position, characteristics and functioning of different waterway signs and river navigation marking located on the digital map.
  • Konferenzbeitrag
    Integration of Danube River Basin Information Resources
    (Umweltinformatik ’98 - Vernetzte Strukturen in Informatik, Umwelt und Wirtschaft - Computer Science for Environmental Protection ’98 - Networked Structures in Information Technology, the Environment and Business, 1998) Pillmann, Werner; Ruzic, Ivica
    Der Schutz der Flieflgew‰sser ist eine wesentliche Teilaufgabe im Umweltschutz. Informationssysteme unterst¸tzten die Entscheidungsfindung f¸r Gew‰sserschutz-Maflnahmen, die im gesellschaftlichen, ˆkonomischen und ˆkologischen Bereich zu treffen sind. Im Donauraum wird derzeit versucht, verf¸gbare Informationskomponenten in ein multinationales Donau-Informationssystem zu integrieren. Die vorliegende Arbeit bietet eine Standortbestimmung, wie sie u.a. durch das DonauUmweltprogramm, das Donauschutz¸bereinkommen und durch die Internationale Kommission zum Schutz der Donau gepr‰gt ist. Vorgestellt wird ein Modell f¸r einen systemorientierten Gew‰sserschutz. Mit diesem Modell kˆnnen Beziehungen zwischen Umweltbelastungen und deren Wirkungen beschrieben und inhaltliche Schwerpunkte eines Informationssystems f¸r den Donauraum identifiziert werden. Weiters sind in dieser Arbeit die Informationsquellen und Informationsfl¸sse zusammengestellt, wie sie in einem neu strukturierten, WWW-basierten Informationssystem zu ber¸cksichtigen sein werden. Mit Inkrafttreten des Donauschutz¸bereinkommens ist in den Donau-Anrainerstaaten eine verst‰rkte Vernetzung der Informationsquellen zu erwarten. Die bestehenden Informationssysteme sind geeignet, in ein umfassendes, umweltbezogenes Donau-Informationssystem integriert zu werden.
  • Konferenzbeitrag
    Object-relational Database as a Data Source for Interactive Dynamic Web Application
    (Environmental Communication in the Information Society - Proceedings of the 16th Conference, 2002) Pecar-Ilic, Jadranka; Ruzic, Ivica; Skocir, Zoran
    A specialized Information system for the data of water quality monitoring for the Danube River Basin has been developed. The Information system enables efficient environmental water-related data management and its verification was performed using the data from the Environmental Programme for the Danube River Basin (EPDRB), in which we actively participated (Pečar-Ilić/Ružić 2001). This paper brings out the most significant aspects of the Object Oriented (OO) modeling of the database for the surface water quality monitoring within the EPDRB. The database was implemented in the Oracle® ORDBMS and served as a data source for the interactive dynamic Web application for temporal and spatial presentation of relevant data. The use of ORDBMS as a database server in a Web based three-tier client/server architecture, such as integrated Information system architecture, has many advantages compared to the use of relational DBMS. The main concepts influencing the increase in Web application performances have been described
  • Konferenzbeitrag
    Review of Croatian ICT Research Activities on Sharing of Environmental Information
    (Proceedings of the European conference TOWARDS eENVIRONMENT, 2009) Ruzic, Ivica; Pecar-Ilic, Jadranka
  • Konferenzbeitrag
    Sharing Data among Users through Dynamic Web Applications for the River Information System
    (Sh@ring – EnviroInfo 2004, 2004) Pecar-Ilic, Jadranka; Ruzic, Ivica
    The aim of the Croatian national joint project as part of the CROatian River Information Services (CRORIS) is to develop a specialized information system for surveillance of the Croatian segment of the Danube River (i.e., River IS). In this paper, emphasis is placed on sharing relevant and timely information among different River IS user groups as well as on efficient data management provided by this information system. For this purpose, a use case diagram of the Unified Modeling Language (UML) was created to represent the hierarchies of user groups and different applications accessed by a particular group. As an example, the Web application architecture for automatic generation of maps, diagrams and reports of water level data is shown. Application architecture is based on the three-tier client-server architecture for the Web. The eXtensible Markup Language (XML) based approach using modern object technologies was applied. For presentation of the time series diagrams, the Scalable Vector Graphic (SVG) documents were created. The concrete application example involves presentation of daily average water level data in the form of the time series diagram for the monitoring station selected on the map.