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ISPRS Int. J. Geo-Inf. 2013, 2(3), 704-728; doi:10.3390/ijgi2030704

Towards an Authoritative OpenStreetMap: Conflating OSM and OS OpenData National Maps’ Road Network

* ,
Nottingham Geospatial Institute, The University of Nottingham, Jubilee Campus, Nottingham NG7 2TU, UK
* Author to whom correspondence should be addressed.
Received: 5 June 2013 / Revised: 25 July 2013 / Accepted: 30 July 2013 / Published: 5 August 2013
(This article belongs to the Special Issue Collaborative Mapping)
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The quality aspects of OpenStreetMap (OSM), as the global representation of crowd-sourced mapping, have always been of priomary concern to academics. While the methodologies for checking its quality against the national maps have been implemented by a number of studies, there are minimal works on how to practically improve the quality of OSM towards being an authoritative map source. This paper presents a method for conflating road attributes, namely the name and reference code, of OSM with the Open Data provided by Ordnance Survey (the British national mapping agency). The added values in the proposed methodology include the daily updates and serving of the conflated maps via open Web Services. More importantly, the OSM crowd correction is facilitated by frequently highlighting and web-serving the individual differences. There are currently over 5,800 differences in matching road names and references between the two datasets. In addition to describing the conflation methodology, the different geographic distribution patterns of the identified differences are discussed. A negative effect of the road density on the ratio of the mismatched features between the two datasets is observable, evidenced by their different geographical distribution over the map. It is shown that the best correspondence between attributes exists in the very dense areas, followed by the very low density areas, and lastly in the middle to large sized cities.
Keywords: OpenStreetMap; national maps; road network; conflation OpenStreetMap; national maps; road network; conflation
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Pourabdollah, A.; Morley, J.; Feldman, S.; Jackson, M. Towards an Authoritative OpenStreetMap: Conflating OSM and OS OpenData National Maps’ Road Network. ISPRS Int. J. Geo-Inf. 2013, 2, 704-728.

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ISPRS Int. J. Geo-Inf. EISSN 2220-9964 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert