Crowdsourcing Geodata - Geofabrik · Crowdsourcing: open / closed “closed” crowdsourcing: users...

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Crowdsourcing Geodata Frederik Ramm [email protected] SoC Summer School Southampton, 08 September, 2009 Looking back on 5 years of 

Transcript of Crowdsourcing Geodata - Geofabrik · Crowdsourcing: open / closed “closed” crowdsourcing: users...

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Crowdsourcing Geodata

Frederik [email protected]

SoC Summer SchoolSouthampton, 08 September, 2009

Looking back on 5 years of 

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OpenStreetMap

● Started 5 years ago in the UK

● 150k users today, about 10% of them active

● 1.5bn GPS track points

● 500m objects (roughly edited manually)

● 40 national mailing lists on 6 continents

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CrowdsourcingUser generated content

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CrowdsourcingUser generated content

Crowdsourcing

                                        marketplaces

                                          competitions

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CrowdsourcingUser generated content

Crowdsourcing

Volunteered Geographic Information

OpenStreetMap

Map Share

Wikimapia

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Crowdsourcing: open / closed

● “closed” crowdsourcing:

users as cheap labour, controlled by central

organisation

● “open” crowdsourcing:

users as partners and decision makers;

building a community

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What

motivates

150.000 people?

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(Berlin, early 2007)

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People

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People

● worker bees

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People

● worker bees

● mayflies

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People

● worker bees

● professionals

● mayflies

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People

● worker bees

● professionals

● ideologues

● mayflies

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People have different...

● technical skills

● patience and endurance

● social behaviour

● thematic expertise

● ...

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Community Care

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Community Care

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Who owns the project?

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Who owns the project?

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Quality and control

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... all in a nutshell:

● no hurdles for joining

● user = stakeholder – relinquish control

● assume good faith

● “instant reward”

● patience

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www.openstreetmap.orgwww.geofabrik.de

Frederik [email protected] GEOFABRIK