Simulation-based approach for uncertainty assessment: Integrating GPS and GIS

Sungchul Hong, Joon Heo, Alan P. Vonderohe

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Integrating GPS with GIS provides an increased capability to handle and manage spatial and non-spatial data in a wide range of transportation applications. However, positional uncertainties inevitably exist in GPS data points and roadway centerline maps, due to the limitations of data collection methods to determine true locations. These uncertainties accumulatively propagate into output information, and consequently reduce the reliability of the GPS and GIS integrated applications for spatial problem-solving and decision-making. Thus, in this paper, a simulation-based approach is presented to estimate overall the qualities of output information from defined uncertainty levels of GPS points and roadway centerline maps. Monte Carlo simulation is then used for error propagation to output information. In case studies, the simulation approach for uncertainty assessment is conducted to a winter maintenance application and a travel time study. Uncertainty analysis results indicate that different applications require different levels of input data qualities. The winter maintenance application is sensitive to positional uncertainties in input data because uncertainties in performance measures accumulate as winter maintenance vehicles repeatedly treat roadways. However, for the travel time study, consistent travel time is estimated when the unit is converted from seconds to minutes. Thus, in comparison to the winter maintenance application, positional uncertainties have a less significant impact on the travel time study.

Original languageEnglish
Pages (from-to)125-137
Number of pages13
JournalTransportation Research Part C: Emerging Technologies
Volume36
DOIs
Publication statusPublished - 2013 Nov

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Geographic information systems
Global positioning system
Geographical Information System
uncertainty
Travel time
simulation
Time and motion study
travel
Uncertainty analysis
Uncertainty
data collection method
data quality
Decision making
decision making
time
performance

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Automotive Engineering
  • Transportation
  • Computer Science Applications

Cite this

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Simulation-based approach for uncertainty assessment : Integrating GPS and GIS. / Hong, Sungchul; Heo, Joon; Vonderohe, Alan P.

In: Transportation Research Part C: Emerging Technologies, Vol. 36, 11.2013, p. 125-137.

Research output: Contribution to journalArticle

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