National Academies webinar on “Using GIS to Make Urban Mobility More Sustainable”

The Geographical Sciences Committee of the National Academies of Science, Engineering and Medicine has posted a recording of my 1 March 2017 webinar on “Using GIS to Make Urban Mobility More Sustainable.”  Thanks to the GSC for sponsoring and hosting this event!

Geographic regions for assessing built environmental correlates with walking trips: A comparison using different metrics and model designs

Tribby C.P., Miller H.J., Brown B.B., Smith K.R. and Werner C.M. “Geographic regions for assessing built environmental correlates with walking trips: A comparison using different metrics and model designs, Health and Place, 45, 1-9.


  • We assess walking with audit and perceived built environment measures.
  • Spatial measures are walking activity spaces and self-defined neighborhoods.
  • Findings indicate that environmental measures have preferred spatial extents.
  • Researchers need to consider varying spatial measures to assess walking correlates


There is growing international evidence that supportive built environments encourage active travel such as walking. An unsettled question is the role of geographic regions for analyzing the relationship between the built environment and active travel. This paper examines the geographic region question by assessing walking trip models that use two different regions: walking activity spaces and self-defined neighborhoods. We also use two types of built environment metrics, perceived and audit data, and two types of study design, cross-sectional and longitudinal, to assess these regions. We find that the built environment associations with walking are dependent on the type of metric and the type of model. Audit measures summarized within walking activity spaces better explain walking trips compared to audit measures within self-defined neighborhoods. Perceived measures summarized within self-defined neighborhoods have mixed results. Finally, results differ based on study design. This suggests that results may not be comparable among different regions, metrics and designs; researchers need to consider carefully these choices when assessing active travel correlates.

Analyzing Movement and Mobility Within Geographic Context

Call for Participation: Workshop on Analyzing Movement and Mobility Within Geographic Context

The Ohio State University
Columbus, Ohio
11-12 May 2017

Abstract submission deadline: Monday, 20 February 2017

The wealth of mobile objects data (MOD) generated by GPS, radiolocation, proximity sensors and other location-aware technologies comes with a significant cost – the lack of path semantics such as the motivations and activities associated with the mobility behavior. Consequently, methods for analyzing MOD focus on the morphology of the object’s path in space with respect to time. Ignoring the geographic context is a major weakness since this can help researchers infer among different behaviors that are consistent with the same mobility behavior, such as whether apparently coordinated movement is coincidental or indicative of a shared activity.  A vital research frontier is developing new MOD analytical techniques that go beyond the movement pattern to include the geographic context within which movement occurs.

We invite broad participation from researchers at any level and from any field of study (e.g., transportation, sociology, animal movement ecology, public health, GIS) with interests in measuring and analyzing animal and/or human movement within its geographic context. Selected participants will receive an award for travel expenses reimbursement ranging from $500-$1000, with priority to students and unfunded scholars.

This is the second of two NSF-sponsored workshops bringing together scholars working on animal movement ecology and human mobility science to generate a nascent interdisciplinary/cross-domain community focusing on the analysis of moving objects:

  1. Measuring and interpreting interactions between and among moving objects (UT – Austin, November 2016);
  2. Analyzing movement and mobility within geographic context (OSU, May 2017).

For more information and abstract submission, please see:

Workshop Co-organizers

  • Harvey J. Miller (The Ohio State University)
  • Jennifer A. Miller (University of Texas at Austin)
  • Gil Bohrer (The Ohio State University)

Steering Committee

  • Somayeh Dodge (University of Minnesota)
  • Joni Downs (University of South Florida)
  • Steven Farber (University of Toronto)
  • Wayne Getz (University of California – Berkeley)
  • Trisalyn Nelson (Arizona State University)
  • Kathleen Stewart (University of Maryland)
  • May Yuan (University of Texas – Dallas)