Processing raw data from global positioning systems without additional information
Open access
Date
2009-01Type
- Journal Article
ETH Bibliography
yes
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Abstract
Since the first GPS studies in the mid-1990s, this way of surveying individual travel behaviour has gained increasing attention in transport research. Compared to classic travel survey methods researchers benefit from more accurate and reliable information. At the same time, the participants’ burden is reduced substantially if the GPS data collection is not accompanied by elaborate questioning. However, without additional information, such as modes and trip purposes, extensive post-processing is required to derive data that can be used for analysis and model estimation. The corresponding procedures are still an ongoing research issue. This paper describes a post-processing procedure that needs no other input than the most basic GPS raw data: three-dimensional positions and the corresponding timestamps. First, the data is thoroughly cleaned and smoothed. Second, trips and activities are determined. Third, the trips are segmented into single-mode stages and the transport mode for each of the stages is identified. The procedure is applied to GPS records collected in the Swiss cities of Zurich, Winterthur and Geneva. 4882 participants carried an on-person GPS-receiver for 6.65 days on average. The results are compared to the Swiss Microcensus 2005 to demonstrate that derived data is ready for further applications, such as discrete choice model estimations. Show more
Permanent link
https://doi.org/10.3929/ethz-a-005652342Publication status
publishedExternal links
Journal / series
Transportation Research RecordVolume
Pages / Article No.
Publisher
Transportation Research BoardSubject
TRANSPORT STATISTICS + TRAFFIC CENSUS (TRANSPORTATION AND TRAFFIC); GENEVA, CITY (CANTON OF GENEVA); GLOBAL POSITIONING SYSTEM, GPS + INDOOR GPS (GEODESY); GLOBAL POSITIONING SYSTEM, GPS + INDOOR GPS (GEODÄSIE); WINTERTHUR, STADT (KANTON ZÜRICH); ZÜRICH, STADT (KANTON ZÜRICH); ZURICH, CITY (CANTON OF ZURICH); VERKEHRSSTATISTIK + VERKEHRSZÄHLUNG (VERKEHR UND TRANSPORT); WINTERTHUR, CITY (CANTON OF ZURICH); GENF, STADT (KANTON GENF)Organisational unit
03521 - Axhausen, Kay W. (emeritus) / Axhausen, Kay W. (emeritus)
02226 - NSL - Netzwerk Stadt und Landschaft / NSL - Network City and Landscape
02655 - Netzwerk Stadt u. Landschaft ARCH u BAUG / Network City and Landscape ARCH and BAUG
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ETH Bibliography
yes
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