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Using Geometric Properties to Evaluate Possible Integration of Authoritative and Volunteered Geographic Information

Lookup NU author(s): Dr David Fairbairn, Maythm Al-Bakri



The assessment of data quality from different sources can be considered as a key challenge in supporting effective geospatial data integration and promoting collaboration in mapping projects. This paper presents a methodology for assessing positional and shape quality for authoritative large-scale data, such as Ordnance Survey (OS) UK data and General Directorate for Survey (GDS) Iraq data, and Volunteered Geographic Information (VGI), such as OpenStreetMap (OSM) data, with the intention of assessing possible integration. It is based on the measurement of discrepancies among the datasets, addressing positional accuracy and shape fidelity, using standard procedures and also directional statistics. Line feature comparison has been undertaken using buffering techniques and statistics, whilst shape metrics, including moments invariant, have been applied to assess polygon matching. The analyses are presented with a user-friendly interface which eases data input, computation and output of results, and assists in interpretation of the comparison. The results show that comparing the positional and shape characteristics of OS data and GDS data, and those of OSM data, indicates that caution should be exercised when considering their integration.

Publication metadata

Author(s): Fairbairn D, Al-Bakri M

Publication type: Article

Publication status: Published

Journal: ISPRS International Journal of GeoInformation

Year: 2013

Volume: 2

Issue: 2

Pages: 349-370

Print publication date: 25/04/2013

Date deposited: 24/04/2013

ISSN (electronic): 2220-9964

Publisher: MDPIAG


DOI: 10.3390/ijgi2020349


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