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Classification of indoor-outdoor location using combined global positioning system (GPS) and temperature data for personal exposure assessment

Cited 7 time in Web of Science Cited 8 time in Scopus
Authors
Lee, B.Lim, C.Lee, K.
Issue Date
2017-04-04
Publisher
BioMed Central
Citation
Environmental Health and Preventive Medicine, 22(1):29
Keywords
Personal exposureGPSTime activityExposure assessmentMicroenvironment
Abstract
Objectives
The objectives of this study was to determine the accuracy of indoor-outdoor classification based on GPS and temperature data in three different seasons.

Methods
In the present study, a global positioning system (GPS) was used alongside temperature data collected in the field by a technician who visited 53 different indoor locations during summer, autumn and winter. The indoor-outdoor location was determined by GPS data alone, and in combination with temperature data.

Results
Determination of location by the GPS signal alone, based on the loss of GPS signal and using the used number of satellites (NSAT) signal factor, simple percentage agreements of 73.6 ± 2.9%, 72.9 ± 3.4%, and 72.1 ± 3.1% were obtained for summer, autumn, and winter, respectively. However, when temperature and GPS data were combined, simple percentage agreements were significantly improved (87.9 ± 3.3%, 84.1 ± 2.8%, and 86.3 ± 3.1%, respectively). A temperature criterion for indoor-outdoor determination of ~ Δ 2°C for 2 min could be applied during all three seasons.

Conclusion
The results showed that combining GPS and temperature data improved the accuracy of indoor-outdoor determination.
Language
English
URI
https://hdl.handle.net/10371/112476
DOI
https://doi.org/10.1186/s12199-017-0637-4
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Graduate School of Public Health (보건대학원)Dept. of Public Health (보건학과)Journal Papers (저널논문_보건학과)
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