Stephen J Mooney1, Daniel M Sheehan1, Garazi Zulaika1, Andrew G Rundle1, Kevin McGill1, Melika R Behrooz1, Gina Schellenbaum Lovasi1. 1. Stephen J. Mooney, Daniel M. Sheehan, Garazi Zulaika, Andrew G. Rundle, and Gina Schellenbaum Lovasi are with Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY. Kevin McGill is with State University of New York at New Paltz. Melika R. Behrooz is with Barnard College, New York.
Abstract
OBJECTIVES: To investigate accuracy of distance measures computed from Global Positioning System (GPS) points in New York City. METHODS: We performed structured walks along urban streets carrying Globalsat DG-100 GPS Data Logger devices in highest and lowest quartiles of building height and tree canopy cover. We used ArcGIS version 10.1 to select walks and compute the straight-line distance (Geographic Information System-measured) and sum of distances between consecutive GPS waypoints (GPS-measured) for each walk. RESULTS: GPS distance overestimates were associated with building height (median overestimate = 97% for high vs 14% for low building height) and to a lesser extent tree canopy (43% for high vs 28% for low tree canopy). CONCLUSIONS: Algorithms using distances between successive GPS points to infer speed or travel mode may misclassify trips differentially by context. Researchers studying urban spaces may prefer alternative mode identification techniques.
OBJECTIVES: To investigate accuracy of distance measures computed from Global Positioning System (GPS) points in New York City. METHODS: We performed structured walks along urban streets carrying Globalsat DG-100 GPS Data Logger devices in highest and lowest quartiles of building height and tree canopy cover. We used ArcGIS version 10.1 to select walks and compute the straight-line distance (Geographic Information System-measured) and sum of distances between consecutive GPS waypoints (GPS-measured) for each walk. RESULTS: GPS distance overestimates were associated with building height (median overestimate = 97% for high vs 14% for low building height) and to a lesser extent tree canopy (43% for high vs 28% for low tree canopy). CONCLUSIONS: Algorithms using distances between successive GPS points to infer speed or travel mode may misclassify trips differentially by context. Researchers studying urban spaces may prefer alternative mode identification techniques.
Authors: Scott Duncan; Tom I Stewart; Melody Oliver; Suzanne Mavoa; Deborah MacRae; Hannah M Badland; Mitch J Duncan Journal: Am J Prev Med Date: 2013-02 Impact factor: 5.043
Authors: Kristian Larsen; Jason Gilliland; Paul Hess; Patricia Tucker; Jennifer Irwin; Meizi He Journal: Am J Public Health Date: 2008-12-23 Impact factor: 9.308
Authors: Marnie Purciel; Kathryn M Neckerman; Gina S Lovasi; James W Quinn; Christopher Weiss; Michael D M Bader; Reid Ewing; Andrew Rundle Journal: J Environ Psychol Date: 2009-12-01
Authors: Jasper Schipperijn; Jacqueline Kerr; Scott Duncan; Thomas Madsen; Charlotte Demant Klinker; Jens Troelsen Journal: Front Public Health Date: 2014-03-10
Authors: Richard V Remigio; Garazi Zulaika; Renata S Rabello; John Bryan; Daniel M Sheehan; Sandro Galea; Marilia S Carvalho; Andrew Rundle; Gina S Lovasi Journal: J Urban Health Date: 2019-08 Impact factor: 3.671
Authors: Christopher N Morrison; Hilary F Byrnes; Brenda A Miller; Emily Kaner; Sarah E Wiehe; William R Ponicki; Douglas J Wiebe Journal: Epidemiology Date: 2019-03 Impact factor: 4.822
Authors: Jason Y Scully; Anne Vernez Moudon; Philip M Hurvitz; Anju Aggarwal; Adam Drewnowski Journal: Int J Environ Res Public Health Date: 2019-04-02 Impact factor: 3.390
Authors: Michelle C Turner; Mark Nieuwenhuijsen; Kim Anderson; David Balshaw; Yuxia Cui; Genevieve Dunton; Jane A Hoppin; Petros Koutrakis; Michael Jerrett Journal: Annu Rev Public Health Date: 2017-03-20 Impact factor: 21.981
Authors: Stephanie Lovinsky-Desir; Kyung Hwa Jung; Michael Montilla; James Quinn; Jessie Cahill; Daniel Sheehan; Frederica Perera; Steven N Chillrud; Jeff Goldsmith; Matthew Perzanowski; Andrew Rundle; Rachel Miller Journal: Ann Am Thorac Soc Date: 2021-01