EuroSDR Projects - Host Ireland

Change Detection Workshop
26.10.2005, Hilton Park Hotel, Nicosia
Participants:
Country Name Organisation
Austria Florian Kressler ARC systems research
Austria Klaus Steinnocher ARC systems research
Austria Michael Franzen BEV
Belgium Ingrid Van den Berghe NGI
Cyprus Georgia Papathoma DLS
Denmark Brian Pileman Olsen KMS
France Marc Pierrot Deseilligny IGN
France Nicola Champion IGN
Germany Andreas Busch BKG
Germany Christian Heipke IPI Univ Hannover
Switzerland André Streilein SwissTopo
UK Keith Murray OS
Steinnocher opens the workshop and presents the agenda
Participants agree upon agenda
Evaluation of CD results:
Streilein gives a presentation on the CD results of the Swiss test sites
evaluation based on qualitative comparison
requirements:
• detected as “new” but “not new”: < 25% (rule 1)
• detected as “not new” but “new”: 0% (rule 2)
problem is rule 1 – too many changes detected,
caused to some extent by generalisation:
• vector data represent settlement areas, single houses cause wrong changes
• displacements of linear features such as roads cause wrong changes
conclusions:
• there is potential for the future
• better tuning of classes is required
• generalisation effects will be reduced when vector data are derived directly from information
source but not from generalised map data (beginning 2007)
Busch gives a presentation on the CD results of the German test site
two methods were compared from ARC systems research (1) and from University of Hannover (2)
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