Projects / Programmes source: ARIS

Kombinirani visokoločljivostni postopki zajemanja, razpoznavanja in vzdrževanja prostorskih podatkov (Slovene)

Research activity

Code Science Field Subfield
2.17.00  Engineering sciences and technologies  Geodesy   

Code Science Field
2.07  Engineering and Technology  Environmental engineering  
Evaluation (rules)
source: COBISS
Researchers (20)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  10700  MSc Vasja Bric  Geodesy  Researcher  2010 - 2012  111 
2.  31160  Vesna Dežman Kete  Geodesy  Researcher  2010 - 2012  63 
3.  31161  Dominik Fajdiga  Geodesy  Researcher  2010 - 2012  62 
4.  17882  PhD Dejan Grigillo  Geodesy  Researcher  2010 - 2012  196 
5.  11117  MSc Tomaž Gvozdanović  Geodesy  Researcher  2010 - 2012  68 
6.  33600  PhD Urška Kanjir  Geodesy  Researcher  2010 - 2012  89 
7.  25640  PhD Žiga Kokalj  Geography  Researcher  2010 - 2012  377 
8.  06120  PhD Mojca Kosmatin Fras  Geodesy  Researcher  2010 - 2012  546 
9.  23500  PhD Klemen Kozmus Trajkovski  Geodesy  Researcher  2010 - 2012  156 
10.  28658  PhD Aleš Marsetič  Geodesy  Researcher  2010 - 2012  105 
11.  31170  MSc Nika Mesner  Geodesy  Researcher  2010 - 2012  104 
12.  15112  PhD Krištof Oštir  Geodesy  Researcher  2010 - 2012  594 
13.  14796  MSc Katja Oven  Geodesy  Researcher  2010 - 2012  170 
14.  15392  PhD Dušan Petrovič  Geodesy  Researcher  2010 - 2012  596 
15.  05892  PhD Dalibor Radovan  Geodesy  Researcher  2010 - 2012  541 
16.  25143  MSc Uroš Ranfl  Computer science and informatics  Researcher  2010 - 2012  23 
17.  24391  MSc Domen Smole  Geodesy  Researcher  2010 - 2012  65 
18.  23564  PhD Mihaela Triglav Čekada  Geodesy  Researcher  2010 - 2012  324 
19.  20005  PhD Tatjana Veljanovski  Geodesy  Researcher  2010 - 2012  154 
20.  24314  PhD Tomaž Žagar  Geodesy  Head  2010 - 2012  71 
Organisations (4)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0246  Geodetic Institute of Slovenia  Ljubljana  5051649000  1,871 
2.  0618  Research Centre of the Slovenian Academy of Sciences and Arts  Ljubljana  5105498000  62,722 
3.  0792  University of Ljubljana, Faculty of Civil and Geodetic Engineering  Ljubljana  1626981  26,276 
4.  1945  DFG CONSULTING information systems, Ltd.  Ljubljana  5940826  139 
Significance for science
Remote sensing technology in the field of aerial-survey, satellite imagery and laser scanning is developing toward better space and radiometric resolution, more accurate direct georeferencing, economical data collection and simultaneous use of different sensors. Combining data from different sensors for automatic and semiautomatic procedures won recognition in some areas, while for extraction of topographic data it was only partly successful. The problem of using automatic and semiautomatic procedures for updating topographic databases is in a large number of object types which need to be recognized and collected. Each data object in a topographic database also consists of several attributes which are difficult or even impossible to interpret by automatic procedures. Main time saving with automatic and semiautomatic procedures is achieved by initial collection of geometric data into a topographic database and the use of change detection for updating. In initial data collection by automatic procedures is important to get geometric data as much as possible. During change detection one needs to compare existing database with new data and find differences showing real changes of topographic objects. In the project some procedures have been tested, which brought new experience about using combination of data from different sensors. Most promising combination for updating topographic databases was combining aerial-imagery and laser scanning data with automatic extraction of basic object types. Results of the research project contribute to successful completion of learning processes for some of involved researches and stimulate new research tasks in this area. Completed research tasks are important for international development activities and discussions about assessment of product from aerial-survey, satellite images and laser scanning, when considering different natural and technical conditions as state-of-the-art source for collecting topographic data and maintain topographic databases.
Significance for the country
National Topographic Database at the 1 : 5.000 scale (DTK5) is completed at 60%. Updating of existing DTK5 sheets is very slow. Updating of National Topographic Database at the 1 : 25.000 scale has stopped, which is why the only national wide Topographic database is at the 1 : 50.000 scale. Sectorial databases are updated independently, therefore this usually leads into unmatched geometry when we try to analyze the data from different sectorial databases together. Most of sectorial databases are updated using orthophoto, which is metrically correct only for topographic objects lying on the ground level. Topographical objects which extend above ground level are mapped on the orthophoto with a location error because the orthophoto is produced from aerial-survey images using Digital Terrain Model (DTM), which does not include high objects. Location error also depends on aerial-survey angle, which vary between different Cyclic Aerial-survey of Slovenia (CAS). As chosen combination of data source for updating topographic databases we propose to Survey Mapping Authority of Republic of Slovenia (SMARS) to collect and distribute aerial-survey imagery and data from laser scanning. With those data source the continuation of CAS is assured, while laser scanning data helps to improve height component of DTM, which is required by many applications. Data from laser scanning also helps with change detection, which is very important for updating topographic databases. Automatic and semiautomatic procedures have been partly developed for detection and collection of topographic objects to fill up 40% of empty sheets of DTK5. For successful updating of existing 60% of the sheets, automatic and semiautomatic procedures for change detection of topographic object types can be used. Technical specification has been written for CAS and Aerial Laser Scanning (ALS) on the national level and it needs to be improved and complemented with new experiences and requirements before each new cycle of source data collection on the national level. In smaller areas aerial-survey and laser scanning are also preformed for national and local requirements without use of detail technical specifications and without proper quality control. There is still much to be done on quality control of source data collection. In the frame of research project some technical, organisation and financial directions have been set for updating of topographic databases: Technical directions: - to agree which topographic databases (e.g. at the 1 : 5.000 and 1 : 50.000 scales) have to be updated on national level need, - it would be advisable to divide the county in three areas based on intensity of development, where details of topographic data would be collected accordingly (e.g. towns at the 1 : 2.500 scale, rural areas at the 1 : 5.000 scale and at the 1 : 10.000 scale for large forests and alpine regions), - to define layers and object types for each of mentioned scales, - to define other space databases (building cadastre, land use, road databases…) which can be connected or be even part of topographic databases and can be used for common updating, - to define updating cycle for certain scales, - to define cycle for source data collection based on updating cycle, - to develop more applications where topographic data is used. Organisation and financial directions: - to connect ministries and large topographic data consumers who could finance topographic data collection and updating together, - to connect ministries and large topographic data consumers who could answer questions from technical part together, - to set up the legal basis for managing organisation and financial matters for updating of topographic databases, - to develop marketing for topographic databases or budget financing for updating purposes.
Most important scientific results Final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Final report, complete report on dLib.si
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