View
213
Download
0
Tags:
Embed Size (px)
Citation preview
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 1
Data Enrichment for adaptive Generalisation
Moritz Neun, Robert Weibel, Dirk Burghardt
Department of Geography, University of Zurich, Switzerland
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 2
outline
1. project & motivation
2. data enrichment
• horizontal and vertical relations
• application using thematic maps, examples
3. research concept
• work plan
• first approaches
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 3
project & motivation
• DEGEN: Data Enrichment for adaptive Generalisation
• the 2 subprojects focus on:1. acquisition of enriched data, representation with MRDBs2. exploitation of enriched data and algorithms
• project members:Robert Weibel & Dirk Burghardt (Principle Investigators)Moritz Neun & Stefan Steiniger (PhD Students)
• funding: Swiss NSF, 04/2004 – 03/2007
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 4
project & motivation
• application trends:- real-time mapping (web, LBS)- on-demand production
• supporting instruments:- data enrichment - MRDB (multiple LODs)- agents
• increasing importance of thematic mapping (polygons, POI)
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 5
data enrichment
initial aim:
The purpose of DEGEN is
the data enrichment, the modelling of the enriched data
and the exploitation of this enriched data
focus on:• thematic maps / GIS in a generic way • integration of data enrichment and MRDB for generalisation
adaptive generalisation (Galanda & Cecconi)
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 6
data enrichment – terms & definitions
• horizontal relationships single level of detail (LOD) only common structural properties (e.g. neighbourhood, pattern, alignment) hierarchic partonomic relations
• vertical relationships linking of objects and/or object groups on multiple LODs hierarchic partonomic relations
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 7
data enrichment – application domain
thematic polygonal maps: seamless (tessellation)
or distributed polygons on
a common background
important factors:• attributes / semantics• topology• alignments (pattern)• shape• orientation
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 8
data enrichment – map examples
geological map
detailed:
1:10’000 - 1:50’000
overview:
1:500’000 - 1:1’000’000
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 9
data enrichment – map examples
geological map
alignment1:500’000
1:25’000
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 10
data enrichment – map examples
soil map
broad range from 1:2’000 – 1:1’000’000
1:100’000
1:200’000
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 11
research concept
work plan
• analysis using example maps (patterns, alignments …)
• analysis and improvement of existing spatial technologies object model
• modelling and managing of the relations in a MRDB data model
• automatic identification / generation of horizontal and vertical relations (pattern recognition, object matching …)
• exploitation for generalisation e.g. agents, incremental updates, on-the-fly generalisation
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 12
research concept – first approaches
map analysis:
e.g. land use map
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 13
research concept – first approaches
representing islands:
hierarchical and topological relations of two LODs
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 14
research concept – first approaches
map analysis:
e.g. geological map
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 15
research concept – first approaches
representing alignments:
two parallel alignments of small polygons having the same orientation
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 16
research concept – conclusion
map analysis - current questions:
• which relations can be used for data enrichment?(topology, neighbourhood order, orientation …)
• how to extract horizontal relations? (pattern recognition, alignments …)
• how match objects, object groups?(e.g. pattern, alignments) in different LODs for establishing vertical relations
• how represent these relations? MRDB data model
neighbourhood order
alignment
ICA Workshop on Generalisation and Multiple Representation; 20-21 August 2004 - Leicester
19.04.23 17
thanks
Thanks a lot!
Any questions, suggestions or comments?