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

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  • Crowdsourcing Geodata

    Frederik [email protected]

    SoC Summer SchoolSouthampton, 08 September, 2009

    Looking back on 5 years of 

  • 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

  • CrowdsourcingUser generated content

  • CrowdsourcingUser generated content

    Crowdsourcing

                                            marketplaces

                                              competitions

  • CrowdsourcingUser generated content

    Crowdsourcing

    Volunteered Geographic Information

    OpenStreetMap

    Map Share

    Wikimapia

  • Crowdsourcing: open / closed

    ● “closed” crowdsourcing:

    users as cheap labour, controlled by central

    organisation

    ● “open” crowdsourcing:

    users as partners and decision makers;

    building a community

  • What

    motivates

    150.000 people?

  • (Berlin, early 2007)

  • People

  • People

    ● worker bees

  • People

    ● worker bees

    ● mayflies

  • People

    ● worker bees

    ● professionals

    ● mayflies

  • People

    ● worker bees

    ● professionals

    ● ideologues

    ● mayflies

  • People have different...

    ● technical skills

    ● patience and endurance

    ● social behaviour

    ● thematic expertise

    ● ...

  • Community Care

  • Community Care

  • Who owns the project?

  • Who owns the project?

  • Quality and control

  • ... all in a nutshell:

    ● no hurdles for joining

    ● user = stakeholder – relinquish control

    ● assume good faith

    ● “instant reward”

    ● patience

  • www.openstreetmap.orgwww.geofabrik.de

    Frederik [email protected] GEOFABRIK

    http://www.openstreetmap.org/

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