International Journal of Geospatial and Environmental Research
Volunteered geographic information (VGI) has been applied in many fields such as participatory planning, humanitarian relief and crisis management. One of the reasons for popularity of VGI is its cost-effectiveness. However, the coverage and accuracy of VGI cannot be guaranteed. The issue of geospatial data quality in the OpenStreetMap (OSM) project has become a trending research topic because of the large size of the dataset and the multiple channels of data access. This paper provides details on a national study of the Canadian OSM street network data for the assessment ofcompleteness, positional accuracy, attribute accuracy, semantic accuracy and lineage. The findings of the map quality can potentially guide cartographic product selection for interested parties and offer a better understanding of future improvement of OSM quality. In addition, the study presents the complex processes behind OSM contributions possibly influenced by data import and remote mapping.