Collaborative Mapping and �the Reliability of Volunteered Data

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Transcript of Collaborative Mapping and �the Reliability of Volunteered Data

  • Collabora'veMappingandtheReliabilityofVolunteeredDataChris'anVoigt*,SusuDobner*,ManuelaSchmidt

    *CentreforSocialInnova'on(TechnologyandKnowledge)

    CentreforSocialInnova'on|Dr.Chris'anVoigt

  • Background:Growingpar'cipa'oncultures

    Increaseofpar'cipa'onplaFormssuchasWikipedia.com(crea'ngknowledgecollec'vely) Thingiverse.com(sharingdigitaldesigns)Wheelmap.org(collec'ngaccessibility)

    Newopportuni'estoaddresscurrentsocietalproblems...

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  • Whatisthechallenge? Problem(quan'tyqualitytradeoff):Ongoingengagementofexis'ngandnewci'zensinpar'cipa'onplaForms,whichisneededinordertoensurequan'tyofcontribu'onsaswellasqualityandconsistencyofcontribu'ons(i.e.thereliabilityofindicatedaccessibilitycondi'ons).

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  • ResearchQues'ons

    a)Whichopera'onalanconceptualpiFallsneedtobeaddressedinordertoimprovemappingoutcomes?

    b)TowhatdegreecanweinscribeMappingKnowledgeintothedesignsofmappingtools?e.g.categoricalversusfunc-onalmapping

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  • CategoricalMapping:Thecoloryellow

    Trafficlightmetaphor ViennaCaseStudy:

    55volunteeringstudents(47%ofclass),Thema'cCartography(OctobertoDecember2014),

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  • Mappingambigui'es

    49%ofrevisitedyellowplaceschanged!

    Changingaccessibilitystatuses

    (1) aplacecontainedmul'ple,aggregatedbarriers

    (2) themapperexpandedhisorherveryno'onofwhatabarrieris

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  • Approach:Cri'calCartography

    Cri'cal=reflectaboutfunc'onalityandpurposeofamap[10]

    useofsemi-structuredmappingprotocolsincludingabriefcommentonthecondi'onsthatmo'vatedacategoriza'on,

    photographsofmappedplacesareflec'ononhowthemappingimpactedtheirpercep'onofurbanaccessibility

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  • Methodology

    DiscussingurbanaccessibilityandOSM Mappingincludingreflec'veprotocols Tworesearcherscodedtheprotocols numberofbarriersconsidered typeofbarriersconsidered valueofphotos(addi'onal,non-verbalinforma'on)

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  • Mappingac'vi'es mappedtheaccessibilityofnewplaces(n=279), revisitedplacesthathadbeencategorizedas'par'allywheelchairaccessible'(n=166)andtookphotos

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  • Aggrega'onofbarriers thelikelihoodofaplacetochangeto'notaccessible'isalmost

    twiceashigh(25%versus47%)ifmapperstakeintoaccountmul'plebarriers.

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    Figure: Impact of aggregated barriers on categorization changes (n=127).

  • Ourconceptualiza'onsofbarriersmaSer

    'Steps'ismen'onedonWheelmap'smobileappinterface,hencea'pre-scrip've'category

    'Narrowness'isanemerging,descrip'vecategory Bothcategorieshavesimilareffects,inturningplacesfrom

    'par'allyaccessible'to'notaccessible'(31%vs.39%)

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  • Amplifiedno'onsofbarriers

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  • Outlook:Par'cipatoryDesignandProjectTango(Google)

    CentreforSocialInnova'on|C.Voigt,S.Dobner

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  • PD-WorkingDefini'on

    Defini'on:Par'cipatorydesignaimsformutuallearningsitua'ons,basedoncollec'vereflec'on[5]

    Leverage:users'prac'ce-basedknowledgetocreatesustainablechanges[4].

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  • GoogleTango:3DSensing trialingnewhardware,aspart

    oftheGoogleTangoProject(3DSensorsandMo'onTracking)

    Integra'onwithexis'ngWheelmapApp

    newHardware:3DSensoren,Mo'onTrackingCameras

    Tes'ngrobustnessofmeassures(speciallyslopes)

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    App:Measure-It OSM-tagwidth=0.9?

  • Summary Par'cipatorymappingisamutuallearningsitua'on,hencecrea'ngawarenessforhowimportantaccessibilityis

    Volunteersaddlocalknowledgeandlivedexperiences

    Par'cipatorymapping,i.e.theworkofvolunteers,isnotmeantasareplacementforneededinforma'ongatheringac'vi'esfrommunicipalityworkers

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  • References1. Fischer,G.:Understanding,fostering,andsuppor'ngculturesofpar'cipa'on.interac'ons.18,4253(2011).2. Gonalves,J.,Kostakos,V.,Karapanos,E.,Barreto,M.,Camacho,T.,Tomasic,A.,Zimmerman,J.:Ci'zen

    mo'va'ononthego:Theroleofpsychologicalempowerment.Interact.Comput.iwt035(2013).3. Spinuzzi,C.:Themethodologyofpar'cipatorydesign.Tech.Commun.52,163174(2005).4. Kensing,F.,Blomberg,J.:Par'cipatorydesign:Issuesandconcerns.Comput.Support.Coop.WorkCSCW.7,

    167185(1998).5. Simonsen,J.,Hertzum,M.:Par'cipa'vedesignandthechallengesoflarge-scalesystems:Extendingtheitera've

    PDapproach.In:Proceedingsofthetenthanniversaryconferenceonpar'cipatorydesign2008.pp.110.IndianaUniversity(2008).

    6. Kostakis,V.,Niaros,V.,Gio'tsas,C.:Produc'onandgovernanceinhackerspaces:Amanifesta'onofCommons-basedpeerproduc'oninthephysicalrealm?Int.J.Cult.Stud.1367877913519310(2014).

    7. Goodchild,M.F.:Ci'zensassensors:theworldofvolunteeredgeography.GeoJournal.69,211221(2007).8. Spindler,R.:OpenStreetMapWheelchairHistory:AsubsetofwheelchairtaggednodesofaPlanetOSM-Full-

    History.In:UnpublishedDatabase(2015).9. Star,S.L.,Griesemer,J.R.:Ins'tu'onalEcology,`Transla'onsandBoundaryObjects:AmateursandProfessionals

    inBerkeleysMuseumofVertebrateZoology,1907-39.Soc.Stud.Sci.19,387420(1989).10. J.W.CramptonandJ.Krygier,Anintroduc'ontocri'calcartography,ACME:anInterna'onalE-journalfor

    Cri'calGeographies,vol.4,no.1,pp.1133,2005.

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