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Measuring sidewalk distances using Google Earth.

Ian Janssen1, Andrei Rosu

  • 1School of Kinesiology and Health Studies, Queen's University, 28 Division St,, Kingston, ON, K7L 3N6, Canada. ian.janssen@queensu.ca

BMC Medical Research Methodology
|March 31, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a new geographic information system (GIS) method to measure sidewalk distance and coverage. This approach enhances the accessibility of crucial data for understanding walking behavior and its impact on public health.

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Area of Science:

  • Urban planning
  • Public health
  • Geographic Information Systems (GIS)

Background:

  • Physical activity, particularly walking, is vital for adult health.
  • Sidewalk availability is a key factor influencing walking behavior.
  • Existing Geographic Information Systems (GIS) data for sidewalks are often inaccessible.

Purpose of the Study:

  • To introduce a novel GIS-based method for quantifying sidewalk distance and coverage along roadways.
  • To address the challenge of accessing and utilizing GIS sidewalk data.

Main Methods:

  • A three-stage protocol utilizing ArcGIS and Google Earth was developed.
  • Road segments were geoprocessed to identify and measure those with sidewalks.
  • The method was validated across 315 diverse sites in Canada.

Main Results:

  • The protocol provides a detailed, step-by-step procedure for sidewalk measurement.
  • Measured sidewalk lengths varied significantly, with a median of 16.20 km per site.
  • Urban areas generally exhibited greater sidewalk coverage compared to rural areas.

Conclusions:

  • A practical GIS protocol for measuring sidewalk distance and coverage is presented.
  • This method facilitates research on the built environment's impact on physical activity.
  • The findings highlight disparities in sidewalk infrastructure between urban and rural settings.