Capturing, sharing, and using local place information

Pamela J. Ludford, Reid Priedhorsky, Ken Reily, Loren Terveen

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

39 Scopus citations


With new technology, people can share information about everyday places they go; the resulting data helps others find and evaluate places. Recent applications like Dodgeball and Sharescape repurpose everyday place information: users create local place data for personal use, and the systems display it for public use. We explore both the opportunities - new local knowledge, and concerns - privacy risks, raised by this implicit information sharing. We conduct two empirical studies: subjects create place data when using PlaceMail, a location-based reminder system, and elect whether to share it on Sharescape, a community map-building system. We contribute by: (1) showing location-based reminders yield new local knowledge about a variety of places, (2) identifying heuristics people use when deciding what place-related information to share (and their prevalence), (3) detailing how these decision heuristics can inform local knowledge sharing system design, and (4) identifying new uses of shared place information, notably opportunistic errand planning.

Original languageEnglish (US)
Title of host publicationProceedings of the SIGCHI Conference on Human Factors in Computing Systems 2007, CHI 2007
Number of pages10
StatePublished - Oct 23 2007
Event25th SIGCHI Conference on Human Factors in Computing Systems 2007, CHI 2007 - San Jose, CA, United States
Duration: Apr 28 2007May 3 2007

Publication series

NameConference on Human Factors in Computing Systems - Proceedings


Other25th SIGCHI Conference on Human Factors in Computing Systems 2007, CHI 2007
CountryUnited States
CitySan Jose, CA


  • Disclosure interface
  • Local knowledge
  • Local search
  • Location privacy
  • Location-based reminder
  • Map-based interface

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