The document describes a project to harmonize spatial base data across the border between Saxony, Germany and the Czech Republic. The project aimed to make the data interoperable by establishing a common coordinate reference system, integrating a shared border geometry, and developing semantic mapping functions between the two countries' data models (ATKIS and ZABAGED). Through geometric and semantic harmonization methods, the project resulted in connected cross-border geospatial data that can be interpreted using either data model.
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Cross-border data harmonization of Saxon ATKIS and Czech ZABAGED
1. Cross border harmonisation in
practice –
exemplified by Saxon ATKIS and
Czech ZABAGED data
GI 2011-X-Border-SDI/GDI-Symposium
Bad Schandau and Děčín
Sylvia Röhnert,
Claudia Gedrange, Marco Neubert
2. Contents
Project Outline
Used Data
Objectives
Geometric Homogenisation
Semantic Harmonisation
Results
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
3. Project Outline
Duration: 01/2009 – 12/2011
Funding: European Union (EFRE, Ziel 3/Cíl 3 SN/CZ)
and the Free State of Saxony
Partner:
Leibniz-Institute of Ecological and Regional Development
e.V. Dresden (IÖR) - Lead Partner
Land Surveying Office of Saxony: Staatsbetrieb
Geobasisinformation und Vermessung Sachsen (GeoSN)
Land Surveying Office of the Czech Republic:
Zeměměřický Úřad (ZÚ)
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
4. Initial position
- different data models -
ZABAGED
(CZ)
ATKIS
(D)
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
5. Objectives
“Cross-Border Harmonisation of Spatial Base Data”
Interoperability on data and model level
Identification and handling with differences
Development of methods for semantic and
geometric matching
Establish semantically comparable and geometrically
connected data
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
7. Geometric Homogenisation
- Objectives -
Geometric Homogenisation
consistent coordinate reference system
integration of a common border geometry
edge matching of cross-border objects
Semantic Harmonisation
bilingual object type catalogues
matching functions
matching categories for semantic
comparision of data models
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
8. Geometric Homogenisation
- Approach -
Coordinate reference system (CRS)
Czech Republik: S-JTSK with Krovak coordinates
Saxony: RD83 with Gauss-Krüger coordinates
definition of a common CRS - ETRS89/UTM
generation of transformation rules
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
9. Geometric Harmonisation
- Approach -
Common Border Geometry
currently used in Saxony
and CR: inexact border geometry
common border measurement
integration of exact measured
border geometry to both datasets
until 2014
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
10. Geometric Homogenisation
- Approach -
Connection of objects along a common border
identify relevant cross-border-object types
definition of connection points
development of a method for geometric
homogenisation (Sicad-Open)
edge matching of important cross border objects
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
12. Semantic Harmonisation
- Objectives -
Geometric Homogenisation
consistent coordinate reference system
integration of a common border geometry
edge matching of cross-border objects
Semantic Harmonisation
bilingual object type catalogues
matching functions
matching categories for semantic
comparision of data models
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
13. Semantic Harmonisation
- Approach - Interoperable
data models
Data model
alignment
Mapping functions
Generate and categories
transformation rules
Similarities,
Concept Heterogenities
Original data comparison
models
Semantic
Semantic concepts
analysis
Bilingual object
Translation type catalogues
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
14. Bilingual Object Catalogues
Translation of object type catalogues
Bilingual database of all object types
and attributes
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
15. Analysis of data models
object types and attributes
ATKIS: overlaying object types
similar themes
different level of detail
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
16. Semantic Harmonisation
- matching tables -
generation of ‚combination tables„ for the
comparision and mapping
attributes for further object type description
ATKIS: object types and attributes used in saxony
(„Bestandsdaten“)
Attribu Attribu
ID Theme ObjectType A1_name A1_value_name A2_name A2_value A2_value_name
te 1 A1_value te2
konstruktionsmerkmalB
A_52003_001 42 AX_Schleuse KON ZUS zustand
auart
konstruktionsmerkmalB
A_52003_002 42 AX_Schleuse KON 1010 Schiffshebewerk ZUS zustand
auart
konstruktionsmerkmalB
A_52003_003 42 AX_Schleuse KON 1020 Kammerschleuse ZUS zustand
auart
konstruktionsmerkmalB Außer Betrieb, stillgelegt,
A_52003_004 42 AX_Schleuse KON ZUS zustand 2100
auart verlassen
konstruktionsmerkmalB Außer Betrieb, stillgelegt,
A_52003_005 42 AX_Schleuse KON 1010 Schiffshebewerk ZUS zustand 2100
auart verlassen
konstruktionsmerkmalB Außer Betrieb, stillgelegt,
A_52003_006 42 AX_Schleuse KON 1020 Kammerschleuse ZUS zustand 2100
auart verlassen
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
17. Semantic Harmonisation
- mapping functions -
matching tables with functions for each concept
object type – attribute value – combinations:
ca. 1100 for ATKIS
ca. 300 for ZABAGED
both transformation directions
complexity and heterogeneity of data models
multiple mappings or no possible mapping
categories for quality of mapping functions
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
18. Semantic Harmonisation
- categories -
A - Biunique =
B - Superset (Z is part of A)
C - Overlap
D - Subset (A is part of Z)
E - Subsumption on a higher hierarchical level
F - Derivation (by spatial relations)
G - No mapping
(A: ATKIS; Z: ZABAGED)
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
19. Semantic Harmonisation
- matching example I -
category C - overlap
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GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
20. Semantic Harmonisation
- matching example II -
differences in classification (object types)
multiple mappings
category B – superset (Z is part of A)
category D – subset (A is part of Z)
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
21. Analysis of used mappings
Concepts with mapping functions
ATKIS > ZABAGED ca. 30 %
ZABAGED > ATKIS ca. 70 %
Frequency of categories multiple mappings (%)
ATKIS to ZABAGED ZABAGED to ATKIS
ZABAGED to ATKIS ATKIS to ZABAGED
90
200
80
Number of Mappings
Frequency in %
70
150 60
50
100 40
30
50 20
10
0 0
A B C D E F 1 2 3 4 5
Mapping Category Number of Single and Multiple Mappings
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
22. Analysis of mappings for the
datasets
Evaluation for testdata of the border region
(mapping: ATKIS to ZABAGED for object types of
„Tatsächliche Nutzung“)
Number of combinations Percentage of the categories in the testdata
Comparision of data model and testdata
180
160
A_44000
140
A
120
100 B
A_43000
80 C
60
D
40 A_42000
20
E
0 F
A B C D E F G A_41000
G
ATKIS combination combination in testdata
0% 20% 40% 60% 80% 100%
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
23. Results overview
Geometric Homogenisation
consistent coordinate reference system (ETRS89/UTM)
definition of a common border geometry
geometrically homogene geodata with connected cross-
border objects
Semantic Harmonisation
bilingual object type catalogues
conceptual analysis of data models
mapping functions for shared use, visualisation and
interpretation of the datasets in both models
specification by categories
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín
24. Thank you for your attention!
Further information:
Sylvia Röhnert: s.roehnert@ioer.de
Claudia Gedrange: c.gedrange@ioer.de
Marco Neubert: m.neubert@ioer.de
Project Website: www.geodat.ioer.info
www.geodat.ioer.info
GI2011-X-Border-SDI/GDI-Symposium, 23/24.05.2011, Bad Schandau/Děčín