Volunteered Geographic Information (VGI): A source of spatial data for Location-based Services (LBS)?
The ubiquity of location-based services (LBS) has created an exciting and rapidly evolving confluence of: GIS, web application programming, mobile cartography and user interfaces, and computer networking. As a consequence the amount of Volunteered Geographic Information (VGI) available on the Internet today has grown enormously in the past few years. Initiatives such as Wikimapia, Google Mapmaker, OpenStreetMap (OSM), geotagging in Flickr, geolocation in Twitter, Geonames, etc have seen VGI become a “hot topic in GIS researchâ€ (Mooney et al, 2010). VGI (such as OSM) has begun to to provide interesting and feasible alternatives to traditional authoritative spatial information from National Mapping Agencies and corporations. However VGI, as a spatial form of user-generated content in Web 2.0, has raised serious concerns and reservations within the GIS, Geomatics, and Cartography communities surrounding its quality, accuracy, sustainability, and fitness for use/purpose (Mooney et al, 2010). Keßler et al (2009) Compared to other projects building on user contributed content, such as Wikipedia, VGI remains on “the GIS peripheryâ€ (Keßler et al, 2009), has been restricted to web-based mapping applications (Haklay, 2010), and not considered for involvement in “serious geomatics applicationsâ€ (Over et al, 2010). This talk will investigate, using OSM as a case-study, if VGI can support the geospatial data/content requirements of todays and tomorrow's LBS. Raper et al (2007) stress that “one key function that is rarely discussed in LBS is geospatial content managementâ€ and subsequently classify it as an urgent research need. Khurri and Luukkainen (2009) argue that spatial data vendors must, to gain competitive advantage in the marketplace, supply accurate, timely, and relevant content to consumers in dynamically changing environments. Through a statistical analysis of the history of user contributions to OSM databases this talk will highlight the advantages and disadvantages of VGI for LBS. Our conclusions indicate that VGI will need to introduce improved management of contributions and contributors to prevent its spatial data moving indefinitely between a status of good and bad quality. The presentation will close with some thoughts on the future for management of geospatial data and associated content for LBS.
Friday, 15 April 2011, 3.00 pm Seminarraum 126 Research Group Cartography Erzherzog-Johann-Platz 1, 1040 Vienna