An analytical study of GWAP-based geospatial tagging systems

Ling Jyh Chen, Yu Song Syu, Bo Chun Wang, Wang Chien Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Geospatial tagging (geotagging) is an emerging and very promising application that can help users find a wide variety of location-specific information, and facilitate the development of future location-based services. Conventional geotagging systems share some limitations, such as the use of a two-phase operating model and the tendency to tag popular objects with simple contexts. To address these problems, geotagging systems based on the concept of 'Games with a Purpose' (GWAP) have been developed recently. In this study, we use analysis to investigate these new systems. Based on our analysis results, we design three metrics to evaluate the system performance, and develop five task assignment algorithms for a GWAP-based system. Using a comprehensive set of simulations under both synthetic and realistic mobility scenarios, we find that the Least-Throughput-First Assignment algorithm (LTFA)is the most effective approach because it can achieve competitive system utility, while its computational complexity remains moderate. We also find that, to improve the system utility, it is better to assign as many tasks as possible in each round. However, because players may feel annoyed if too many tasks are assigned at the same time, it is recommended that multiple tasks be assigned one by one in each round in order to achieve higher system utility.

Original languageEnglish
Title of host publication2009 5th International Conference on Collaborative Computing
Subtitle of host publicationNetworking, Applications and Worksharing, CollaborateCom 2009
DOIs
Publication statusPublished - 2009 Dec 1
Event2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2009 - Washington, DC, United States
Duration: 2009 Nov 112009 Nov 14

Publication series

Name2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2009

Other

Other2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2009
CountryUnited States
CityWashington, DC
Period09/11/1109/11/14

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Software

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    Chen, L. J., Syu, Y. S., Wang, B. C., & Lee, W. C. (2009). An analytical study of GWAP-based geospatial tagging systems. In 2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2009 [5365010] (2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2009). https://doi.org/10.4108/ICST.COLLABORATECOM2009.8322