Maps and Graphics for Blind and Partially Sighted People

Accessibility I

3505.2 - Quality Assessment and Accessibility Mapping in an Image-based Geocrowdsourcing Testbed

Monday, July 3
1:50 PM - 2:10 PM
Location: Virginia C

Mapping for blind and partially sighted persons has a long history within the International Cartographic Association and cartographic community. The use of new technology within the accessibility mapping domain has both good and bad exemplars. The most significant current geotechnology focus area is geocrowdsourcing, where the public contributes data that would otherwise be difficult to capture with a traditional mapping workflow. Along with the many benefits of geocrowdsourcing, there are certain critical drawbacks to the approach, including reliability and accuracy. The authors of this paper have designed a geocrowdsourcing testbed to explore the dynamics of geocrowdsourcing and quality assessment, and produce obstacle reports that are quality checked and disseminated to the public. These reports are then used for route planning, obstacle avoidance, and spatial awareness. The geocrowdsourcing testbed has recently been modified and streamlined to focus on image-based reporting. This paper explores the general quality assessment strategies of the geocrowdsourcing testbed and how they are implemented in an image-based reporting paradigm, where less input is required from the crowdsourcing contributor. The general quality assessment of position and temporal characteristics is still possible, while general report attributes and detail is now supplied by a moderator. Some quality assessment techniques, such as the derivation of obstacle location from image direction vectors, does not produce reliable results, but other general approaches such as the generation of a buffered convex hull from image location metadata does work dependably.

Matthew T. Rice

Associate Professor
George Mason University

Dr. Matt Rice is an Associate Professor in the George Mason University Department of Geography and Geoinformation Science, where he directs the Masters Program in Geographic and Cartographic Sciences. Dr. Rice is the President-Elect of the Cartographic and Geographic Information Society, and the Local Arrangements Chair for the 28th International Cartographic Congress. His research focuses on geocrowdsourcing, quality assessment, sonification, and accessibility. He is a supporter and participant in the ICA Commission on Maps and Graphics for Blind and Partially Sighted Persons, led by Alejandra Coll Escanilla and Waldirene Ribeiro.

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Dan Jacobson

Associate Professor
Department of Geography, University of Calgary

Dr. Dan Jacobson (PhD) is an Associate Professor in the Department of Geography, at the University of Calgary, Canada. His research includes how individuals understand, communicate and represent spatial environments. This includes multi-sensory computer interfaces that provide sound and touch, with a focus on providing accessible cartographic information to blind and vision impaired individuals. He was the chair of the International Cartographic Association Commission on maps and graphics for the blind 2007-2011. Prior collaboration with Dr. Mathieu Simonnet who developed ‘SeaTouch,' an audio-haptic interface for non-visual sailors. More recent research, in collaboration with Dr. Matt Rice, at George Mason University and colleagues, has focused on Volunteered Geographic Information (VGI) for accessible maps. An emerging focus is on digital humanities research investigating historical mapping in England and Wales.

Presentation(s):

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Matthew T. Rice

Associate Professor
George Mason University

Dr. Matt Rice is an Associate Professor in the George Mason University Department of Geography and Geoinformation Science, where he directs the Masters Program in Geographic and Cartographic Sciences. Dr. Rice is the President-Elect of the Cartographic and Geographic Information Society, and the Local Arrangements Chair for the 28th International Cartographic Congress. His research focuses on geocrowdsourcing, quality assessment, sonification, and accessibility. He is a supporter and participant in the ICA Commission on Maps and Graphics for Blind and Partially Sighted Persons, led by Alejandra Coll Escanilla and Waldirene Ribeiro.

Presentation(s):

Send Email for Matthew Rice


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