Understanding Information Requirements in "Text Only" Pedestrian Wayfinding Systems

William Mackaness, Phil Bartie, Candela Sanchez-Rodilla Espeso

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

Abstract

Information that enables an urban pedestrian to get from A to B can come in many forms though maps are generally preferred. However, given the cognitive load associated with map reading, and the desire to make discrete use of mobile technologies, there is increasing interest in systems that deliver wayfinding information solely by means of georeferenced spoken utterances that essentially leave the user "technology free." As a critical prior step, this paper examines the optimal delivery of such georeferenced text based instructions in anticipation of their spoken utterance. We identify the factors governing the content, location of instruction and frequency of delivery of text instructions such that a pedestrian can confidently follow a prescribed route, without reference to a map. We report on street level experiments in which pedestrians followed a sequence of text instructions delivered at key points along a set of routes. In examining instructions that are easy to follow, we compare landmark based instructions with street name based instructions. Results show that a landmark based approach is preferred because it is easier to assimilate (not because it is faster). Analysis also revealed that some degree of redundancy in the instructions is required in order to bring "comfort" to the user's progress. There still remains the challenge of modeling the saliency of landmarks, knowing what is the most efficient set of instructions, and how to vary the frequency of instruction according to the complexity of the route. The paper concludes by identifying a set of design heuristics useful in the design of text based instructions for wayfinding.
Original languageEnglish
Title of host publicationGeographic Information Science
Subtitle of host publicationGIScience 2014
PublisherSpringer
Pages235-252
Number of pages18
ISBN (Electronic)9783319115931
ISBN (Print)9783319115924
DOIs
Publication statusPublished - 2014
Event8th International Conference on Geographic Information Science 2014 - Vienna, Austria
Duration: 24 Sep 201426 Sep 2014

Publication series

NameLecture Notes in Computer Science
PublisherSpringer
Volume8728
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference8th International Conference on Geographic Information Science 2014
CountryAustria
CityVienna
Period24/09/1426/09/14

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    Mackaness, W., Bartie, P., & Espeso, C. S-R. (2014). Understanding Information Requirements in "Text Only" Pedestrian Wayfinding Systems. In Geographic Information Science: GIScience 2014 (pp. 235-252). (Lecture Notes in Computer Science; Vol. 8728). Springer. https://doi.org/10.1007/978-3-319-11593-1_16