Can the crowd be authoritative? Steven Feldman
An authoritative crowd? #geomob
May 09, 2015
Short presentation on quality assurance and improvement of OpenStreetMap for @Geomob London on 24-11-2012
Can a quality assured product increase user confidence within the "professional" community and encourage increased contribution to fill in the gaps.
Can a quality assured product increase user confidence within the "professional" community and encourage increased contribution to fill in the gaps.
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Can the crowd be authoritative?
Steven Feldman
A quick judgement
http://www.flickr.com/photos/safari_vacation/5929769873/
Whose Authority?
http://www.flickr.com/photos/spunter/2907888414/
able to be trusted as being accurate or true; reliable: “clear, authoritative information and advice”“an authoritative source”(of a text) considered to be the best of its kind and unlikely to be improved upon:“this is likely to become the authoritative study of the subject”
commanding and self-confident; likely to be respected and obeyed:“his voice was calm and authoritative”proceeding from an official source and requiring compliance or obedience:“authoritative directives”
What makes geodata authoritative?
© OpenStreetMap contributors, CC-BY-SA
http://www.flickr.com/photos/rdmillar/1325739265/
Accurate
Complete
http://www.flickr.com/photos/lwr/2113499196/
Correctly attributed
http://www.flickr.com/photos/scottmarkwell/2207949953/
Authority > Accuracy
How accurate is OSM in GB?
No formal and
consistent QA processes applied!
Muki says …In 2010 coverage
at 69.8%
In 2010 coverage at 69.8% but
attribution 24.3%
the analysis of OSM shows
that deprived communities
and rural areas are not well
covered, especially when attributes are considered
http://www.flickr.com/photos/chrisfleming/5942012099/
Could OSM be an authoritative source for GB?
http://www.flickr.com/photos/thorinside/194806347/
Users vs Producers
OSM-GB WMS
WFS
Tile Service
Projected to OSGB
Data available for download/reuse
on OSM terms
FREE
! Rules based quality
improved
WMS WFS
Tile SvcOSM Master
DatabaseOSM-GB Raw
Database
1Spatial Quality Rules
EngineRules based improvement actions
OSM-GBQA/QI DB
OSM-GB QA Report for potential
action
?
A step through the OSM-GB workflow
Download Data
Will automated rules based processes improve quality?
Will formal QA increase confidence/authority?How can improved QA & confidence increase contribution?Can “professional” contributors be “motivated” to fill in gaps?Are there use cases that will support a sustainable commercial model for OSM-GB?
Some Research Questions
There is no one to blame
http://www.flickr.com/photos/a2gemma/1448178195/
Can the crowd be authoritative?
http://www.flickr.com/photos/wallyg/160534588/
Yes and No
Does it matter?
A final thought
Martin Usborne http://londonist.com
Maps don’t have to be authoritative, they can just
be fun and useful
Thank You
www.osmgb.org.uk
www.knowhwerconsulting.co.uk
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