This paper describes the results of an analysis of the OpenStreetMap (OSM) database for the United Kingdom (UK) and Ireland (correct to April 2011). 15, 640 OSM ways (polygons and polylines), resulting in 316, 949 unique versions of these objects, were extracted and analysed from the OSM database for the UK and Ireland. In our analysis we only considered “heavily edited” objects in OSM: objects which have been edited 15 or more times. Our results show that there is no strong relationship between increasing numbers of contributors to a given object and the number of tags (metadata) assigned to it. 87% of contributions/edits to these objects are performed by 11% of the total 4128 contributors. In 79% of edits additional spatial data (nodes) are added to objects. The results in this paper do not attempt to evaluate the OSM data as good/poor quality but rather informs potential consumers of OSM data that the data itself is changing over time. In developing a better understanding of the characteristics of “heavily edited” objects there may be opportunities to use historical analysis in working towards quality indicators for OSM in the future.
Coast, S. How OpenStreetMap is Changing the World. In Proceedings of the 10th International Symposium on Web & Wireless GIS; Tanaka, K., Fr¨ohlich, P., Kim, K.S., Eds.; Springer: Berlin, Germany, 2010; 6574, p. 4.
Over, M.; Schilling, A.; Neubauer, S.; Zipf, A. Generating web-based 3D City Models from OpenStreetMap: The current situation in Germany. Comput. Environ. Urban Syst. 2010, 34, 496–507, doi:10.1016/j.compenvurbsys.2010.05.001.
Haklay, M.; Basiouka, S.; Antoniou, V.; Ather, A. How many volunteers does it take to map an area well? The validity of linus' law to volunteered geographic information. Cartogr. J. 2010, 47, 315–322, doi:10.1179/000870410X12911304958827.
MapQuest. AOL Corporate Communications-MapQuest “Opens Up” in Europe with Open-Source Mapping with UK Launch. AOL Online Blog report. 2010. Available online: http://corp.aol.com/2010/07/09/mapquest-opens-up-in-europe-with-open-source-mapping-with-uk-l/ (accessed on 15 March 2012).
Bing Maps. Bing Engages Open Maps Community. Microsoft Bing Maps Online Blog report, 2010. Available online: http://www.bing.com/community/site_blogs/b/maps/archive/2010/11/23/bing-engages-open-maps-community.aspx (accessed on 15 March 2012).
de Leeuw, J.; Said, M.; Ortegah, L.; Nagda, S.; Georgiadou, Y.; DeBlois, M. An assessment of the accuracy of volunteered road map production in Western Kenya. Remote Sens. 2011, 3, 247–256, doi:10.3390/rs3020247.
Zielstra, D.; Zipf, A. A Comparative Study of Proprietary Geodata and Volunteered Geographic Information for Germany. In Proceedings of the 13th AGILE International Conference on Geographic Information Science; Painho, M., Santos, M.Y., Pundt, H., Eds.; Springer Verlag: Guimar？es, Portugal, 2010.
Mooney, P.; Corcoran, P.; Winstanley, A.C. Towards Quality Metrics for OpenStreetMap. In Proceedings of the 18th SIGSPATIAL International Conference on Advances in Geographic Information Systems; ACM: New York, NY, USA, 2010; pp. 514–517.
Goetz, M.; Zipf, A. Extending OpenStreetMap to Indoor Environments: Bringing Volunteered Geographic Information to the Next Level. In Proceedings of the UDMS: Urban and Regional Data Management: 2011; Rumor, M., Zlatanova, S., LeDoux, H., Eds.; Delft: Delft, The Netherlands, 2011; pp. 47–58.
Qian, X.; Di, L.; Li, D.; Li, P.; Shi, L.; Cai, L. Data cleaning approaches in Web 2.0 VGI application. In Proceedings of 2009 17th International Conference on Geoinformatics, Fairfax, VA, USA, 12–14 August, 2009; pp. 1–4.
Fritz, S.; McCallum, I.; Schill, C.; Perger, C.; Grillmayer, R.; Achard, F.; Kraxner, F.; Obersteiner, M. Geo-Wiki.Org: The use of crowdsourcing to improve global land cover. Remote Sens. 2009, 1, 345–354, doi:10.3390/rs1030345.
Mooney, P.; Corcoran, P.; Winstanley, A.C. A Study of Data Representation of Natural Features in OpenStreetMap. In Proceedings of the 6th GIScience International Conference on Geographic Information Science, Zurich, Switzerland, 14–17 September 2010; p. 150.
Flanagin, A.J.; Metzger, M.J. The role of site features, user attributes, and information verification behaviours on the percieved credibility of Web-based information. New Media Soc. 2007, 9, 319–342, doi:10.1177/1461444807075015.
Ballatore, A.; Bertolotto, M. Semantically Enriching VGI in Support of Implicit Feedback Analysis. In Web and Wireless Geographical Information Systems; Tanaka, K., Fr？hlich, P., Kim, K.S., Eds.; Springer Berlin/Heidelberg: Berlin, Heidelberg, Germany, 2011; Volume 6574, pp. 78–93.
Brando, C.; Bucher, B. Quality in User Generated Spatial Content: A Matter of Specifications. In Proceedings of the 13th AGILE International Conference on Geographic Information Science; Painho, M., Santos, M.Y., Pundt, H., Eds.; Springer Verlag: Guimar？es, Portugal, 2010.
Anderka, M.; Stein, B.; Lipka, N. Towards Automatic Quality Assurance in Wikipedia. In Proceedings of the 20th International Conference Companion on World Wide Web; ACM: New York, NY, USA, 2011; pp. 5–6.
Antin, J. My Kind of People? Perceptions About Wikipedia Contributors and Their Motivations. In Proceedings of the 2011 Annual Conference on Human Factors In Computing Systems; ACM: New York, NY, USA, 2011; pp. 3411–3420.
Mooney, P.; Corcoran, P. Accessing the History of Objects in OpenStreetMap. In Proceedings of the 14h AGILE International Conference on Geographic Information Science; Geertman, S., Reinhardt, W., Toppen, F., Eds.; Springer Verlag: Utrecht, The Netherlands, 2011; p. 155.
MaZderMind. osm-History-Splitter: A C++ Tool to Split OSM Full-History-Planet-Dumps into Smaller Extracts Based on Bounding-Boxes or Polygons. 2012. Available online: https://github.com/MaZderMind/osm-history-splitter (accessed on 19 March 2012).
Nemoto, K.; Gloor, P.; Laubacher, R. Social Capital Increases Efficiency of Collaboration Among Wikipedia Editors. In Proceedings of the 22nd ACM Conference on Hypertext and Hypermedia; ACM: New York, NY, USA, 2011; pp. 231–240.
Overell, S.; Sigurbj？rnsson, B.; van Zwol, R. Classifying Tags Using Open Content Resources. In Proceedings of the Second ACM International Conference on Web Search and Data Mining; ACM: New York, NY, USA, 2009; pp. 64–73.
Kessler, C.; Trame, J.; Kauppinen, T. Tracking Editing Processes in Volunteered Geographic Information: The Case of OpenStreetMap. In Proceedings of the COSIT'11 Workshop: Identifying ObjectsProcesses and Events in Spatio-Temporally Distributed Data (IOPE), Belfast, Maine, USA, 12 September 2011; pp. 17–29.
Roick, O.; Loos, L.; Zipf, A. A Technical Framework for Visualizing Spatio-Temporal Quality Metrics of Volunteered Geographic Information. In Proceedings of the GEOINFORMATIK 2012-Mobility and Environment, Braunschweig, Germany, 28–30 March 2012.
Mooney, P.; Corcoran, P. Using OSM for LBS—An Analysis of Changes to Attributes of Spatial Objects. In Proceedings of the 8th International Symposium on Location-Based Services; Gartner, G., Ortag, F., Eds.; Springer: Vienna, Austria, 2011; pp. 165–176.
Pirolli, P.; Wollny, E.; Suh, B. So You Know You're Getting the Best Possible Information: A Tool That Increases Wikipedia Credibility. In Proceedings of the 27th International Conference on Human Factors In Computing Systems; ACM: New York, NY, USA, 2009; pp. 1505–1508.