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Datum: 06.04.2011 | Anlass: FOSSGIS2011




Mapping für einen sozialen Zweck
Holger Dieterich
Christoph Bünte
Raul Krauthausen
Gestatten,
SOZIALHELDEN
•  Wir sind
   ein gemeinnütziger Verein

•  Wir stehen für soziale
   Innovationen in
   Deutschland

•  Ziel ist es, Menschen für
   gesellschaftliche Probleme
   zu sensibilisieren und
   zum Umdenken zu
   bewegen
Projekte
superzivi.com (2004)
pfandtastisch-helfen.de (seit 2007)
wheelmap.org (seit 2010)
Wheelmap
Bei Null anfangen?

Da muss es doch schon etwas geben…
Qype
Aus den API Nutzungsbedingungen:

“…all Qype Content shall at all times remain the sole and
exclusive property of Qype”
Öffentlich geförderte regionale Datensilos




Beispiel: barrierefreies-einkaufen.de
Openstreetmap
wheelchair=yes/no/limited
wheelchair:description=text
Usability
Herausforderungen
Hürden

•  Wheelchair-tag wird nicht gerendert
•  Registrierung
•  Editoren sind sehr umfangreich, Tag-Bearbeitung für
   Anfänger schwer zu finden
Potlach2 auf openstreetmap.org
“Ampel” bei Wheelmap.org
Anonym:
•  Nur umstellen des wheelchair tags


Als OSM-Nutzer eingeloggt:
•  weitere Daten editieren hinzufügen
•  neue Orte einzeichnen
Technische
Herausforderungen
Herausforderung 1: APIs

•  XAPI beherrscht Bounding Box Queries à sehr langsam
•  Cloudmade API à keine aktuellen POI Daten


Deshalb:

•  Hosting einer eigenen Datenbank
   •  Hoster unterstützt nur MySQL
   •  Planet importer in plain Ruby: 20 Tage import
   •  Importer auf 7h „getuned“
Herausforderung 2: Geodaten in MySQL

•  Unterstützung von Ways
   •  MySQL support für shape queries buggy
   •  Kein import für Ways

Deshalb:

•  Serverumzug => Freie Wahl der Datenbank
   •  Überlegung: NoSQL DB bzw. ElasticSearch
Herausforderung 3: Synchronisation

•  Sync von Daten aus mehreren Datenquellen sehr schwierig

Deshalb:

•  Erhobene Daten gehen nicht in die eigene DB
•  Updaten auf einen job queue à Worker schickt Daten über
   die API nach OSM
•  OSMosis holt die Daten minütlich wieder an in die DB
Changes                   OSMosis   Importer

                                               F
          OpenStreetMap                        r
                                               o




                                                   Wheelmap
                                               n
                                               t
                                               e
                                      DB       n
                                               d
                                               /
                                               A
                                               P
                                               I

  API                     Worker    Jobqueue
Ergebnisse
wheelchair-Statusänderungen auf wheelmap.org!
                         22.10.10-5.4.11!
30000"




25000"




20000"




15000"




10000"




 5000"




    0"
Medienecho
Ausblick
•    Listen statt Karten: rollstuhlgerechte Orte für jede Stadt
•    Datenspenden besorgen
•    Wheelchair-API?
•    Wheelmap für mehr Handys
•    Gedruckte Wheelmap-Karte
Mithelfen
•  Bulk imports
•  OAuth2-Unterstützung
•  Restful API

•  Wheelchair=yes/no/limited taggen!
•  Mapping parties gemeinsam mit Menschen mit
   Mobilitätseinschränkungen
Folien auf:
blog.wheelmap.org


sozialhelden.de
@wheelmaporg

Christoph Bünte
@chris_can_do

Raul Krauthausen
@raulde

Holger Dieterich
@holgerd

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Wheelmap.org - Mapping für einen sozialen Zweck