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Spatial Data Computations in a Toolkit to Improve Accessibility for Mobile Applications

  • Janne Kovanen
  • Paul D. Kelly
  • Stuart Ferguson
  • L. Tiina Sarjakoski
  • Tapani Sarjakoski
Part of the Lecture Notes in Geoinformation and Cartography book series (LNGC)

Abstract

The HaptiMap toolkit is an open-source library enabling location-based mobile application developers to include features advancing accessibility in their applications. This paper presents the structure of the geospatial data access of the HaptiMap toolkit. In addition, an evaluation is carried out on the processing performance of the toolkit. The operation performances are compared with the corresponding operations of a leading open-source library, which supports computational geometry calculations. The results indicate that implementing custom-optimized algorithms for the toolkit’s data model is a feasible approach when the algorithms are specific or simple enough, while complex algorithms should be accessed through wrapped functions.

Keywords

Geographic information computational geometry accessibility opensource audio tactile 

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References

  1. Anastassova M, Roselier S (2010) A Preliminary User Evaluation of Vibrational Patterns Transmitting Spatial Information. In Proceedings of the MobileHCI 2010, September 7–10, Lisboa, PortugalGoogle Scholar
  2. Blattner MM, Sumikawa DA, Greenberg RM (1989) Earcons and icons: Their structure and common design principles, Human-Computer Interaction 4:11–44CrossRefGoogle Scholar
  3. Bosman S, Groenendaal B, Findlater JW, Visser T, de Graaf M, Markopoulos P (2003) GentleGuide: An Exploration of Haptic Output for Indoors Pedestrian Guidance. In Chittaro L (Ed.), Human-Computer Interaction with Mobile Devices and Services. 5th International Symposium, Mobile HCI 2003, Udine, Italy, September 8–11, 2003, Proceedings, pp. 358–362Google Scholar
  4. Chittaro L, Burigat S (2005) Augmenting Audio Messages with Visual Directions in Mobile Guides: an Evaluation of Three Approaches. In MobileHCI ’05: Proceedings of the 7th international conference on Human computer interaction with mobile devices & services. New York, NY, USA, pp. 107–114Google Scholar
  5. eSpeak (2011) eSpeak: Speech Synthesizer. http://espeak.sourceforge.net/Google Scholar
  6. Gaver WW (1986) Auditory icons: Using sound in computer interfaces. Human-Computer Interaction 2:167–177CrossRefGoogle Scholar
  7. Graham R (1972) An Efficient Algorithm for Determining the Convex Hull of a Finite Point Set. Info. Proc. Letters 1:132–133CrossRefGoogle Scholar
  8. Henning M (2007) API Design Matters. ACM Queue 5 (4), Mai/June, 2007Google Scholar
  9. Holland S, Morse DR, Gedenryd H (2002) AudioGPS: Spatial audio navigation with a minimal attention interface. Personal and Ubiquitous Computing 6(4):253–259. ISO – International Organization for Standardisation (2004) ISO 19125:2004. Geographic information – Simple feature access – Part 1: Common architectureCrossRefGoogle Scholar
  10. Kelly PD, Ferguson S, Rafferty K, Peng J-X (2011) Use of Geographical Information for Non-Visual Perceptualisation. In Proceedings of Geographical Information Systems Research UK (GISRUK 2011), Portsmouth, UK, 2011.Google Scholar
  11. Klante P, Krösche J and Boll S (2004) AccesSights – A Multimodal Location-Aware Mobile Tourist Information System. In Computers Helping People with Special Needs. Proceedings of the 9th International Conference, ICCHP 2004. Lecture Notes in Computer Science, vol. 3118/2004, July 2004, pp. 287–294Google Scholar
  12. Loomis JM, Golledge RG, Klatzky RL, Speigle JM, Tietz J (1994) Personal Guidance System for the Visually Impaired. In Assets ’94: Proceedings of the first annual ACM conference on Assistive technologies. New York, NY, USA, pp. 85–91Google Scholar
  13. Magnusson C, Beidegard B, Rassmus-Gröhn K (2009) Soundcrumbs – Hansel and Gretel in the 21st century. In Proceedings of the 4th international workshop on Haptic and Audio Interaction Design (HAID’09)Google Scholar
  14. Magnusson C, Brewster S, Sarjakoski T, Roselier S, Sarjakoski LT, Tollmar K (2009) Exploring Future Challenges for Haptic, Audio and Visual Interfaces for Mobile Maps and Location Based Services. Proceedings of the CHI 2009 –LocWeb Workshop, April 4–9, Boston, MA, USAGoogle Scholar
  15. McGookin D, Brewster S, Priego P (2009) Audio Bubbles: Employing Non-speech Audio to Support Tourist Wayfinding. In Proceedings of the 4th international workshop on Haptic and Audio Interaction Design (HAID’09)Google Scholar
  16. Pielot M, Boll S (2010) Tactile Wayfinder: Comparison of Tactile Waypoint Navigation with Commercial Pedestrian Navigation Systems. In proceedings of the 8th International Conference on Pervasive Computing, May 8, Helsinki, FinlandGoogle Scholar
  17. Pielot M, Poppinga B, Heuten W, Boll S (2011) 6th Senses for Everyone! The Value of Multimodal Feedback in Handheld Navigation Aids. In Proceedings of the ICMI ‘11: 13th International Conference on Multimodal Interaction.Google Scholar
  18. Schafer RM (1977) The Sounscape: Our Sonic Environment and the Tuning of the World. Rochester:Destiny Books, 1994 (1st. ed. 1977)Google Scholar
  19. Scheibel T (1997) Sharing memory with memory-mapped files. Performance Computing/ Unix Review 15(11):47–50, October 1997Google Scholar
  20. SpatiaLite (2011) SpatiaLite 2.3.1 http://www.gaia-gis.it/spatialite/Google Scholar
  21. Strachan S, Eslambolchilar P, Murray-Smith R (2005) gpsTunes – controlling navigation via audio feedback. In MobileHCI 2005 1:275–278, Salzburg, Austria, ACMGoogle Scholar
  22. Van Erp JBF, Van Veen HAHC, Jansen C, Dobbins T (2005) Waypoint Navigation with a Vibrotactile Waist Belt, ACM Transactions on Applied Perception 2(2):106–117CrossRefGoogle Scholar
  23. Walker NB, Nance A, Lindsay J (2006) Spearcons: speech-based earcons improve navigation performance in auditory menus. In Proceedings of the International Conference on Auditory Display, pp. 95–98Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Janne Kovanen
    • 1
  • Paul D. Kelly
    • 2
  • Stuart Ferguson
    • 2
  • L. Tiina Sarjakoski
    • 1
  • Tapani Sarjakoski
    • 1
  1. 1.Department of Geoinformatics and CartographyFinnish Geodetic InstituteMasalaFinland
  2. 2.Queen’s University BelfastBelfastUK

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