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GEODYNAMIC INFORMATION SYSTEM 
F. Vodopivec*, D. Medak**, B. Pribitevi¢** 
“Department of Geodesy, Faculty of Civil Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia 
**Department of Geomatics, Faculty of Geodesy, University of Zagreb, 10000 Zagreb, Croatia — damir.medak @ geof.hr 
KEY WORDS: geodynamics, information systems, spatio-temporal databases, Java Database Connectivity 
ABSTRACT: 
During the last ten years geodetic measurement technologies significantly improved the knowledge about the geodynamics of 
Adriatic micro-plate. Of course, one should not forget important results achieved with electro-optical distance-meters few decades as 
well. Repeated satellite measurements within the projects like Croatian geodynamic network (CRODYN), Central Europe Regional 
Geodynamics Project (CERGOP), Geodynamic network of the City of Zagreb and several local geodynamical projects in Slovenia 
yielded a huge amount of observations and derived results. Especially CERGOP has integrated a considerable part of geodynamic 
research in Central Europe, established a large number of collaborative activities, exchange of information and perhaps most notably 
- mutual trust and understanding among the participants. The goals of recently started Fifth Framework European Commission 
project CERGOP-2/Environment are among others to support local area geodynamic research, environmental studies, seismic hazard 
assessments, meteorology. All these results should be systematically organized into geodynamic databases. Such databases must 
include the temporal component beside the three spatial components. This paper reviews efforts done so far and describes a 
conceptual model of geodynamic information system (GeodIS), with a spatio-temporal database management system as its core, 
possibilities of the implementation of such system in networked environment. Monitoring geodynamical phenomena is a long-term 
project and careful preparation of data storage and management facilities is necessary in order to enable users with various needs 
accessing the information from various types of computers running various operating systems. At the implementation level, we stress 
the advantages of platform-independent object-relational technology tied with Java Database Connectivity (JDBC). Finally, we 
discuss possible uses of such system for practical purposes. Since CERGOP-2 includes a Multipurpose and Interdisciplinary Sensor 
Array for Environmental Research in Central Europe, it is obvious that practical importance of geodynamic information grows above 
classical interests of geodesists and geophysicists only. Therefore, it is necessary more than ever that such information is spread 
using the means of communication accessible and understandable by all interested parties. 
1. INTRODUCTION 2. INVESTIGATION OF ADRIATIC MICROPLATE 
The worst earthquakes on the European continental mass 2.1 Experiences in Slovenia 
happen at the northern edge of Adriatic Microplate (Andersson 
and Jackson, 1987). This edge stretches from southwards of Slovenia started with measurement of recent movements very 
eastern Alps in Italy and Slovenia to southern Dinarides in early. Together with Vienna Technical University, Geodetic 
Croatia. Strong earthquakes in Idrija, Ljubljana, Kríko and Institute of Slovenia (Geodetski Zavod) started the 
Zagreb are well described in literature. There is a good evidence measurements in the Karavanke area. The network was divided 
of existing tectonical movements: e.g. in Idrija there is a fault in Austrian and Slovenian part. Each partner has measured his 
2500 m wide and 450 m high. It is clear that the movements had part, but the adjustment was accomplished for complete 
happened in the past. The consequences of current movements network. Initial measurements were classical. 
are earthquakes. A scientific challenge is to find the correlation 
between the rate of movements and the probability that an E. 
earthquake is going to happen in the near future. 
  
  
In order to achieve that goal, the information about the recent 
crustal movements is needed (Altiner et al, 2001). : o 
Unfortunately, we cannot measure these movements directly, : S 3 
but through geodetic networks related to different temporal * ve 
  
reference frames (epochs). The differences between series of | 
geodetic measurements in different epochs yield the recent ouh” Ve 
movements. ole 
The difficulty of such measurements in the past was that the M 
accuracy of geodetic instruments and methods was too low to = 
detect small movements of landmasses. That was surpassed by 
invention of precise electronic distance-meters, and recently by 
Global Positioning System (GPS). The abundance of data urges 
for long-term stable storage management methods. 
  
  
  
Figure I. Geodynamic measurement campaigns in Slovenia: 
1-Karavanke, 2-Ljubljana Central System, 3- 
Ljubljana micro networks, 4-Idrija/Kanomlja, 5- 
Krsko I, 6-Orliski prelom, 7-Kr&ko II. 
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