Dynamic Accuracy of GPS Receivers for Use in Health Research: A Novel Method to Assess GPS Accuracy in Real-World Settings
Clicks: 274
ID: 262392
2014
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Popular Article
30.0
/100
274 views
41 readers
AI Quality Assessment
Not analyzed
Readership in this journal
PopularRanked #61 of 100 articles by views in Frontiers in public health
Most read
Least read
Bar heights use a square-root scale.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
The emergence of portable global positioning system (GPS) receivers over the last 10 years has provided researchers with a means to objectively assess spatial position in free-living conditions. However, the use of GPS in free-living conditions is not without challenges and the aim of this study was to test the dynamic accuracy of a portable GPS device under real-world environmental conditions, for four modes of transport, and using three data collection intervals.We selected four routes on different bearings, passing through a variation of environmental conditions in the City of Copenhagen, Denmark, to test the dynamic accuracy of the Qstarz BT-Q1000XT GPS device. Each route consisted of a walk, bicycle and vehicle lane in each direction. The actual width of each walking, cycling and vehicle lane was digitized as accurately as possible using ultra-high-resolution aerial photographs as background. For each trip we calculated the percentage that actually fell within the lane polygon, and within the 2.5, 5 and 10 meter buffers respectively, as well as the mean and median error in meters.Our results showed that 49.6% of all ≈68,000 GPS points fell within 2.5 meters of the expected location, 78.7% fell within 10 meters and the median error was 2.9 m. The median error during walking trips was 3.9 m, 2.0 m for bicycle trips, 1.5 m for bus and 0.5 m for car. The different area types showed considerable variation in the median error: 0.7 m in open areas, 2.6 m in half-open areas and 5.2 m in urban canyons. The dynamic spatial accuracy of the tested device is not perfect, but we feel that it is within acceptable limits for larger population studies. Longer recording periods, for a larger population are likely to reduce the potentially negative effects of measurement inaccuracy. Furthermore, special care should be taken when the environment in which the study takes place could compromise the GPS signal.
| Reference Key |
jasper2014frontiersdynamic
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | Schipperijn, Jasper;Kerr, Jacqueline;Duncan, Scott;Madsen, Thomas;Klinker, Charlotte Demant;Troelsen, Jens; |
| Journal | Frontiers in public health |
| Year | 2014 |
| DOI |
DOI not found
|
| URL | |
| Keywords |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.