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Republic of Slovenia
Ministry of environment protection and regional planning
GEO INFORMATION CENTRE
ENTITY CATALOGUE
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HYDROORAPHIC NETWORK
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Fig. 5. The structure of the entity catalogue.
MEPRP
The Ministry of Environmental Protection and Regional
Planning (MEPRP) is one of the largest ministries in Slo
venia and encompasses the following sectors with geo-
oriented data:
Land-Survey Administration;
Town-Planning Inspection;
Hydro-Meteorological Agency;
Seismological Agency;
Physical Planning Agency;
Environmental Protection and Water Regime Agency;
Directorate for Environmental Protection and Water
Management;
Water-Management Inspection;
Administration for Nuclear Safety.
The main characteristic of the ministry is the extreme
diversification of the geo-oriented data regarding defini
tion of entities and data flow. Especially the data flow is
very characteristic and needs special treatment. Data
ranges from static (digital terrain model) to dynamic
(hydro-meteorologic) data.
Standards
The main problem to establish the foundation for the
relational graphical/tabular data bases was to create the
catalogue of the geo-oriented entities for the entire
ministry. Therefore two independent working groups were
formed to elaborate the entity catalogues for the geo-
information infrastructure data bases and the sector data
bases. This huge work resulted in a catalogue with
390
approximately 600 entities uniquely defining the entire
geo-information infrastructure and sector data bases
(fig. 5).
Geo-information infrastructure
and sector data bases
As mentioned the data bases of the geo-information in
frastructure will be generated by using the analogue
material of map series at scale 1 5 000. Apart from the
topographical contents the entities of sector data bases
will be transferred from different cartographical sources
to the map 1 5 000 in order to enable a unique refer
enced geocoding system. The colour separates of the
maps (2600 in total) will be scanned, vectorized, edited
(fig. 6) and linked to the tabular entities in relational data
bases to enable combined data base query. The data
bases will be stored centrally but are accessible from the
different regional centres through a network. A minimum
of graphical/tabular entities will enable to link the detailed
data bases according to the proposed data flow.
Updating the data bases
and the role of photogrammetry
The updating of the topographical data bases will be done
by digital photogrammetric methods whereas the sector
data bases will be maintained by the specific sectorial
data collective methods.
Due to the availability of a digital terrain model with high
quality for the entire territory of Slovenia the proposed
solution uses digital orthophoto technique. Properly
designed and planned aerial survey, combined with the
digital terrain model enables the production of the digital
aerial photographs (fig. 7). These can either be vectorized
and used for updating topographical data bases or left in
raster format for other applications and archiving. The
possibility of using satellite data with high resolution will
be tested.
Colour separates of
1 5 000 map
SCANINliNq
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Production line for
graphic/tabular data bases
Fig. 6. The production line for data capture.
NGT GEODESIA 93
