01520408

Component

https://doi.org/10.3141/2460-05

Numerous studies of geocoding systems have been used to assign geographical coordinates to incident reports identified simply with textual address references. These studies have typically focused on the level of accuracy achieved by various geocoding systems and found that acceptable results can be achieved. Depending on the quality of the input data, a match rate between 70% and 83% can be expected, with varying levels of accuracy. However, few studies have looked at the potential of freely available online geocoding services to spatially locate traffic crash records. It is proposed that although limitations currently exist, services such as the Google Maps API provide sufficient functionality and adequate accuracy for use with a wide variety of geocoding applications. A case study used traffic crash records from a municipality in the province of Quebec, Canada, with the goal of quantifying the geocoding results. It was found that although a competitive match rate was obtained, manual revision was required to ensure that the results returned by the geocoder referred to the same intersection that existed in the input address field.

01559855

14-4605

English

pp 39–46

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295529

Print

Figures (3) ; References (18) ; Tables (3)

Accuracy; Case studies; Crash records; Data quality; Geographic information systems; Traffic crashes

Data mapping

Quebec (Province)

Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics

TRIS, TRB, ATRI

Jan 27 2014 3:36PM

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