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1
Content available Multiple criteria analysis of Spatial information for a preliminary assessment of the landslide Susceptibility for environmental protection in the Zagreb Region based on geodynamic network
Medved I., Medak D., Pribicević B., Dapo A.
Reports on Geodesy
|
2011
|
z. 2/91
37-42
EN
'Land' plays multidimensional role in maintaining many global processes, therefore sustainable planning and management of land resources is an important issue at the global forum. The process of land resource planning and associated decision-making invariably involves multiple objectives, multiple criteria and multiple social interests and preferences. Such complexity necessitates a systematic approach to the decision-making process to accommodate the multiplicity and multi dimensionalities of the problem to improve the reasonability of decisions and to justify the actions to be taken. The objective of this study is to perform a preliminary assessment of the landslide susceptibility for enviroment protection in the City of Zagreb. A geographic information system (GIS) database was compiled based on data from topographical and geological maps. Weight of evidence, analytic hierarchy process (AHP), and fuzzy logic methods, as well as hybrid methods, were used to establish the rating of classed for each factor, weigting for the factors, and to combine multiple factor layers into landslide-susceptibility maps. The results recognize relative weights between the influential factors and promote the real efficiency on City of Zagreb hillsides disaster can be important references for establishing the evaluation model.
2
Content available remote MSc curriculum in GIScience - an example from Croatia
Kozak J., Medak D., Car A.
Roczniki Geomatyki
|
2010
|
T. 8, z. 1
73-77
PL
Artykuł przedstawia efekty projektu "Geographic Information Science and Technology in Croatian Higher Education" (GIST-CroHE), realizowanego w ramach programu TEMPUS. Partnerami projektu były Uniwersytety w Zagrzebiu i Salzburgu oraz Uniwersytet Jagielloński, przy czym głównym beneficjentem projektu był Wydział Geodezji Uniwersytetu w Zagrzebiu. Projekt rozpoczął się we wrześniu 2007 roku, a jego głównym celem była wszechstronna i zgodna z założeniami Procesu Bolońskiego aktualizacja programu studiów magisterskich z geoinformatyki na Wydziale Geodezji Uniwersytetu w Zagrzebiu, zatwierdzonego w 2004 roku. Efektem aktualizacji były propozycje nowych kursów oraz zmiany zawartości i metodyki nauczania kursów istniejących, a także wypracowanie metod oceny jakości nauczania.
3
Content available Correlation between geodetic and geological models in the geodynamic network of the city of Zagreb
Dapo A., Pribičević B., Medak D., Prelogović E.
Reports on Geodesy
|
2009
|
z. 1/86
115-122
EN
Since 1997 till 2008, several series of precise GPS measurements have been conducted on specially stabilized points of Geodynamical Network of City of Zagreb with purpose of investigation of tectonic movements and related seismic activity of the wider area of the City of Zagreb. From this series of GPS measurements geodetic model of tectonic movements has been created. In the area of interest, independent geological investigations have been conducted through even longer period of time which resulted in geological model of tectonic movements. Comparison and correlation of these two independent models will be presented in this paper.
4
Content available Conceptual model of geotechnical information system
Medved I., Medak D., Pribičević B.
Reports on Geodesy
|
2009
|
z. 1/86
111-114
EN
Geological, geodynamical and hydrological research in Zagreb area resulted in several spatial data of different lineage, coordinate systems and resolution. The goal of this paper is the gathering of data in a unique geotechnical information system, which will br the basis for further analysis. We are using ArcGIS modules for spatial and geostatistical analysis. Geotechnical information systems can be used to prevent, mitigate and alleviate damage caused by the natural disasters such as eartquakes and landslides. However, the geotechnical data bases have not been utilized extensively. Examples of using the data bases this chapter for seismic hazards assessment, planning for new structures, ground water hydrology, disaster mitigation systems of gas pipelines, and infrastructure management systems are presented.
5
Content available Precise geodetic and hydrographic measurements in Karst areas
Pribičević B., Medak D., Dapo A.
Reports on Geodesy
|
2008
|
z. 1/84
55-59
EN
Recent advances in GPS-technology (GNSS) enable hydrographic surveyors to capture the topography of the bottom and the water surface with even more accuracy. Faculty of Geodesy, University of Zagreb, recently acquired the latest technology for performing the precise hydrographic surveying: Trimble R8 GNSS receiver that is going to be used with already used echo sounding equipment. The GSM signals are used for transmitting corrections from the base station to the rover. Thus, it is possible to use single-frequency DESO 14 for two-frequencies bathymetry through repeating the course of the vessel on exactly the same points with both transducers. It is expected that the new technology shall yield more accurate results and increase measurement speed, because the OTF times should be significantly shortened.
6
Content available Application of 3D terrestrial laser scanning in geodynamic monitoring
Medak D., Pribičević B., Medved I.
Reports on Geodesy
|
2008
|
z. 1/84
49-53
EN
During last 10 years, geodesists from the Faculty of Geodesy, University of Zagreb, together with geologists and tectonicians established and performed a number of series of GPS-measurements on the Geodynamic Network of the City of Zagreb. The results of these campaigns emphasized the spots with higher level of geodynamic activity, resulting in damages on objects: houses, walls, churches. Therefore, the technology of threedimensional laser scanning has been employed in order to capture much more detailed picture of fast movements. In the first experimental phase of the project, only rapidly sliding areas are observed. The main hypothesis of proposed research is to check if the technology of precise laser scanning is able to produce comparable point clouds showing the movements of objects in the field. As an additional source of information, this research should contribute to the better understanding of the processes below the Earth surface.
7
Content available Two-frequencies bathymetry of Plitvice Lakes
Pribicevic B., Medak D., Dapo A., Medved I.
Reports on Geodesy
|
2006
|
z. 1/76
99-102
EN
Faculty of Geodesy, University of Zagreb, recently acquired the latest technology for performing the precise hydrographic surveying. The equipment consists of ATLAS DESO 14 surveying echosounder with two transducers: one with high frequency (210 kHz) and second with low frequency (33 kHz). The position of the transducer is determined with Real Time Kinematics GPS pair of Trimble R8 receivers. Thus, it is possible to use single-frequency DESO 14 for two-frequencies bathymetry through repeating the course of the vessel on exactly the same points with both transducers. The results of the application of this method in measuring two lakes in the National Park Plitvice Lakes are shown in this paper.
8
Content available remote Research on the international geodynamics test - area Plitvice Lakes within CERGOP-2 project
Medak D., Pribicevic B.
Reports on Geodesy
|
2006
|
z. 4/79
165-172
EN
Activities on this work-package subgroup include preparation activities at the University of Zagreb, Faculty of Geodesy and field reconnaissance in the area of the Plitvice Lakes National Park. The combination of equipment has been tested in the field and it is now ready to be deployed in the Plitvice Lakes test area. The goal is to measure the Lake Kozjak with the combination of precise bathymetry and RTK GPS (Real Time Kinematics). In the area of Plitvice Lakes, we were looking for the best positions (sky clearance, obstacles, satellite visibility, ground stabilization) for future geodynamic GPS-measurements. At the same time, we have chosen the points which will be used as base points for hydrographic measurements using the RTK-method. The cooperation with the Croatian Hydrometeorological Institute was established in order to compare the datasets of previous hydrological measurements with current situation in the Lakes. In cooperation with the tectonic experts we prepare the structural map of the area of the Plitvice Lakes in order to find better explanation for possible movements of tectonic units in the area. The geological situation is particularly important for hydrologic assessment since the loss of water (lowering of water level) in the lakes is caused by faults.
9
Content available Geology, tectonics, geodesy and geodynamics of Croatia
Medak D., Pribičević B., Prelogović E.
Reports on Geodesy
|
2006
|
z. 5/80
285--300
EN
This paper summarizes recent research activities on merging the geodetic, geologic and neotectonic evidence of geodynamics in Croatia. The area of the City of Zagreb, which is the boundary zone of Eastern Alps, Dinnarides and Pannonian Basin is included as well. It is shown here that the evidence for fractures of Eastern Adriatic differs from the previous hypotheses. This conclusion is derived from the results of various geodetic measurements: satellite positioning (GPS), astro-geodetic measurements of deflections of the vertical. These results are combined with geologic measurements and results of seismic activity studies in order to give more detailed and more accurate picture of the current situation in the tectonically very active region of Dinnarides. Several GPS-campaigns performed in the City of Zagreb area are examined as well. Due to the proximity of Croatian capitol, special attention has been paid to the effects of possible hazard on construction code.
10
Content available remote Geodetic and geologic research of recent tectonic activity in Dinarides
Pribicevic B., Medak D., Prelogovic E.
Reports on Geodesy
|
2006
|
z. 4/79
173-180
EN
Initial tectonic movements of Adriatic Microplate result in dominating compression in the area of Dinarides. Collected structural data, compared with surface and depth data, with seismological and geodetic measurements taken in the account enabled the classifications of structures. Deformations and movements of structures directly depend on the stress orientation. This orientation varies from between 340-160° to 30-210°. In order to visualize the stress orientation, formation of different types of structures and their movements, examples of compressional structures are shown, as well as rotations of structures and conditions of creation of extensional structures. Finally, the map with fault zones is included, too. The data show narrowing of the area of Adriatic Microplate and the existence of its southern and northern part. Both parts are changing movement directions, leading to more tectonic activity. In active areas, formation of structures is recognized, and causality with fault locations and seismic activity is established. The amplitudes of tectonic movements derived from geodetic measurements between 1994 and 1998 represent important contribution for better understanding the tectonic activities in the area.
11
Content available Geodesy, tectonics and geodynamics of Dinnarides
Medak D., Pribicevic B., Prelogovic E.
Reports on Geodesy
|
2006
|
z. 1/76
85-90
EN
This paper summarises recent aetivities on merging the geodetic, geologic and neotectonic evidence of geodynamics in Croatian part of Dinnarides. The area of the City of Zagreb, which is the boundary zone of Eastern Alps, Dinnarides and Pannonian Basin is incIuded as well. It is shown here that the evidence for fractures of Eastern Adriatic differs from the previous hypotheses. This concIusion is derived from the results of various geodetic measurements: satellite positioning (GPS), astro-geodetic measurements of detlections of the vertical. These results are combined with geologic measurements and results of seismic activity studies in order to give more detailed and more accurate picture of the current situation in the tectonically very active region of Dinnarides. Several GPS-campaigns performed in the City of Zagreb area are examined as well. Due to the proximity of Croatian capitol, special attention has been paid to the effects of possible hazard on construction code.
12
Content available Five years of EUREF-permanent GPS-stations in Croatia
Medak D., Pribicevic B., Dapo A., Medved I.
Reports on Geodesy
|
2006
|
z. 1/76
91-97
EN
In October 2000, the Faculty of Geodesy, University of Zagreb, with the support o German Federal Agency for Cartography and Geodesy (BKG) and Croatian State Geodetic Administration, established two permanent GPS-stations: one in Dubrovnik and another one in Osijek. The stations became the part of large global network International GPS Service for Geodynamics (IGS), ie. the part of EUREF/Permanent project. This paper describes the background for the choice of locations, stabilization and precise measurements of local GPS-networks that connected the stations with EUREF/CROREF points nearby. The problems in the maintenance of the stations have been described as welI. A view on the perspective of permanent GPS-services in Croatia is given, too.
13
Content available Final Report on research activities within the project CERGOP2/Environment in Croatia
Medak D., Pribicevic B., Prelogovic E., Dapo A., Medved I.
Reports on Geodesy
|
2006
|
z. 1/76
81-84
EN
Researchers from the Faculty of Geodesy, University of Zagreb, organized and performed various research activities within the project CERGOP2/Environment. The participation in both CEGRN campaigns was ensured with two epoch stations: Brusnik and Hvar. Activities related to the working package 10.4: International geodynamic test area Plitvice Lakes included several hydrographic measurements with the combination of GPS positioning and echosounder bathymetry. Repeated measurements with two frequencies yielded new insight about the sediments on the lake bottom. A structural map of the Lakes has been prepared, too. Geodynamic measurements has been performed on several special points. The foundation for future permanent station in the area of the Plitvice Lakes has been prepared.
14
Content available remote Application of geographical information systems and hydrographic surveying in the international geodynamic test area Plitvice Lakes
Medak D., Pribicevic B., Dapo A.
Reports on Geodesy
|
2006
|
z. 4/79
181-185
EN
During the second year of the project A Multipurpose and Interdisciplinary Sensor Array for Environmental Research in Central Europe (CERGOP-2/Environment), several important research activities in the International geodynamic test area Plitvice Lakes were performed. The geodynamic points in the vicinity of lakes were used as base point during combined GPS/echosounder measurements. Two frequencies have been used in order to find out about the underlying structures below the lake bottom. The results obtained show significant fabris which should be carefully interpreted in order to predict the future travertine formation, which is the essential phenomenon of the Plitvice Lakes. All data are processed by means of spatial analysis in a geographical information software (GIS). All equipment used was tested in laboratory conditions.
15
Content available remote Research on the international geodynamic test-area Plitvice Lakes within CERGOP-2 project
Medak D., Pribičević B.
Reports on Geodesy
|
2004
|
nr 2/69
81--87
EN
Activities on this work-package subgroup include preparation activities at the University of Zagreb, Faculty of Geodesy and field reconnaissance in the area of the Plitvice Lakes National Park. The combination of equipment has been tested in the field and it is now ready to be deployed in the Plitvice Lakes test area. The goal is to measure the Lake Koyak with the combination of precise bathymetry and RTK GPS (Real Time Kinematics). In the area of Plitvice Lakes, we were looking for the best positions (sky clearance, obstacles, satellite visibility, ground stabilization) for future geodynamic GPS-measurements. At the same time, we have chosen the points which will be used as base points/or hydrographic measurements using the RTK-method. The cooperation with the Croatian Hydrometeorological Institute was established in order to compare the datasets of previous hydrological measurements with current situation in the Lakes. In cooperation with the tectonic experts we prepare the structural map of the area of the Plitvice Lakes in order to find better explanation for possible movements of tectonic units in the area. The geological situation is particularly important for hydrologic assessment since the loss of mter (lowering of water level) in the lakes is caused by faults.
16
Content available remote Research on the international geodynamic test-area Plitvice Lakes within CERGOP-2 Project
Medak D., Pribicevic B.
Reports on Geodesy
|
2004
|
nr 4/71
117--124
EN
Activities on this work-package subgroup include preparation activities at the University of Zagreb, Faculty of Geodesy and field reconnaissance in the area of the Plitvice Lakes National Park. The combination of equipment has been tested in the field and it is now ready to be deployed in the Plitvice Lakes test area. The goal is to measure the Lake Kozjak with the combination of precise bathymetry and RTK GPS (Real Time Kinematics). In the area of Plitvice Lakes, we were looking for the best positions (sky clearance, obstacles, satellite visibility, ground stabilization) for future geodynamic GPS-measurements. At the same time, we have chosen the points which will be used as base points for hydrographic measurements using the RTK-method. The cooperation with the Croatian Hydrometeorological Institute was established in order to compare the datasets of previous hydrological measurements with current situation in the Lakes. In cooperation with the tectonic experts we prepare the structural map of the area of the Plitvice Lakes in order to find better explanation for possible movements of tectonic units in the area. The geological situation is particularly important for hydrologic assessment since the loss of water (lowering of water level) in the lakes is caused by faults.
17
Content available remote Geodetic and geologic research of recent tectonic activity in Dinarides
Pribičević B., Medak D., Prelogović E.
Reports on Geodesy
|
2004
|
nr 2/69
125--131
EN
Initial tectonic movements of Adriatic Microplate result in dominating compression in the area ofDinarides. Collected structural data, compared with surface and depth data, with seismological and geodetic measurements taken in the account enabled the classifications of structures. Deformations and movements of structures directly depend on the stress orientation. This orientation varies from between 340-160° to 30-210°. In order to visualize the stress orientation, formation of different types of structures and their movements, examples of compressional structures are shown, as well as rotations of structures and conditions of creation of extensional structures. Finally, the map with fault zones is included, too. The data show narrowing of the area of Adriatic Microplate and the existence of its southern and northern part. Both parts are changing movement directions, leading to more tectonic activity. In active areas, formation of structures is recognised, and causality with fault locations and seismic activity is established. The amplitudes of tectonic movements derived from geodetic measurements between 1994 and 1998 represent important contribution for better understanding the tectonic activities in the area.
18
Content available remote Geodetic and geologic research of recent tectonic activity Dinarides
Pribičević B., Medak D., Prelogović E.
Reports on Geodesy
|
2004
|
nr 4/71
125--131
EN
Initial tectonic movements of Adriatic Microplate result in dominating compression in the area of Dinarides. Collected structural data, compared with surface and depth data, with seismological and geodetic measurements taken in the account enabled the classifications of structures. Deformations and movements of structures directly depend on the stress orientation. This orientation varies from between 340-160° to 30-210°. In order to visualize the stress orientation, formation of different types of structures and their movements, examples of compressional structures are shown, as well as rotations of structures and conditions of creation of extensional structures. Finally, the map with fault zones is included, too. The data show narrowing of the area of Adriatic Microplate and the existence of its southern and northern part. Both parts are changing movement directions, leading to more tectonic activity. In active areas, formation of structures is recognized, and causality with fault locations and seismic activity is established. The amplitudes of tectonic movements derived from geodetic measurements between 1994 and 1998 represent important contribution for better understanding the tectonic activities in the area.
19
Content available remote Processing of geodynamic GPS-Networks with GAMIT software
Medak D., Pribicevic B.
Reports on Geodesy
|
2003
|
z. 1/64
75-84
EN
In 1997 the project Basic GPS-Network of the City of Zagreb resulted in a modern, geodetic foundation of high accuracy for the Croatian capitol. More than 4250 points homogeneously covering the wider area of the City were established. Apart from that, the network was planned as the basis for investigations of tectonic movements and related seismic activity of Zagrebacka gora. In 2001, the second GPS-campaign was performed on 40 geodynamic points and similar proeessing techniques were applied to both sets of results. Scientific GPS-software GAMIT was used to process and compare two epochs (1997 and 2001) and the GLOBK module was used for origin analysis and calculation of displacements. In this paper, we describe our experiences with GAMIT and propose its wider use in CERGOP framework. Possible applications of performed measurements and results of interdisciplinary cooperation with other geoscientists are listed, too.
20
Content available remote Investigation of geodynamics of Adriatic micro-plate by means of geodetic, geophysical and geologic methods
Pribicevic B., Medak D., Prelogovic E.
Reports on Geodesy
|
2003
|
z. 1/64
85-92
EN
We investigated the correlation between the results of astrogeodetic, gravimetric and geomagnetic measurements and the geological data about recent geological structures in the area of Eastern Adriatic. Comparison of movements of surface geological structures and geodetic and geophysical measurements yielded strong correlation between the three independent methods. Hence, combined recent structure of the area was obtained. We used the gravimetric data and total vertical deflections. Analysis of the results shows clearly defined boundary between the Adriatic Micro-Plate and the Dinarides, stretching from SE to NW along the outer rim of Croatian islands. Three independent sources of data show accurate location of two tectonic pIates, which cause significant seismicity in the area. Future research shall include seismological data.
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