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Field Validation of Food Service Listings: A Comparison of Commercial and Online Geographic Information System Databases

Author

Listed:
  • Laura Seliske

    (Department of Community Health & Epidemiology, Queen’s University, Kingston, ON K7L 3N6, Canada)

  • William Pickett

    (Department of Community Health & Epidemiology, Queen’s University, Kingston, ON K7L 3N6, Canada
    Clinical Research Center, Angada 3, Kingston General Hospital, 76 Stuart St., Kingston, ON K7L 2V7, Canada)

  • Rebecca Bates

    (School of Kinesiology & Health Studies, Queen’s University, 28 Division Street, Kingston, ON K7L 3N6, Canada)

  • Ian Janssen

    (Department of Community Health & Epidemiology, Queen’s University, Kingston, ON K7L 3N6, Canada
    School of Kinesiology & Health Studies, Queen’s University, 28 Division Street, Kingston, ON K7L 3N6, Canada)

Abstract

Many studies examining the food retail environment rely on geographic information system (GIS) databases for location information. The purpose of this study was to validate information provided by two GIS databases, comparing the positional accuracy of food service places within a 1 km circular buffer surrounding 34 schools in Ontario, Canada. A commercial database (InfoCanada) and an online database (Yellow Pages) provided the addresses of food service places. Actual locations were measured using a global positioning system (GPS) device. The InfoCanada and Yellow Pages GIS databases provided the locations for 973 and 675 food service places, respectively. Overall, 749 (77.1%) and 595 (88.2%) of these were located in the field. The online database had a higher proportion of food service places found in the field. The GIS locations of 25% of the food service places were located within approximately 15 m of their actual location, 50% were within 25 m, and 75% were within 50 m. This validation study provided a detailed assessment of errors in the measurement of the location of food service places in the two databases. The location information was more accurate for the online database, however, when matching criteria were more conservative, there were no observed differences in error between the databases.

Suggested Citation

  • Laura Seliske & William Pickett & Rebecca Bates & Ian Janssen, 2012. "Field Validation of Food Service Listings: A Comparison of Commercial and Online Geographic Information System Databases," IJERPH, MDPI, vol. 9(8), pages 1-7, July.
    • Handle: RePEc:gam:jijerp:v:9:y:2012:i:8:p:2601-2607:d:19047
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    References listed on IDEAS

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    1. Davis, B. & Carpenter, C., 2009. "Proximity of fast-food restaurants to schools and adolescent obesity," American Journal of Public Health, American Public Health Association, vol. 99(3), pages 505-510.
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    1. Julia Díez & Alba Cebrecos & Iñaki Galán & Hugo Pérez-Freixo & Manuel Franco & Usama Bilal, 2019. "Assessing the Retail Food Environment in Madrid: An Evaluation of Administrative Data against Ground Truthing," IJERPH, MDPI, vol. 16(19), pages 1-12, September.
    2. Laura Seliske & William Pickett & Andrei Rosu & Ian Janssen, 2012. "Identification of the Appropriate Boundary Size to Use When Measuring the Food Retail Environment Surrounding Schools," IJERPH, MDPI, vol. 9(8), pages 1-13, July.

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