Caio dos Anjos Paiva
Whether from conventional mapping or collaborative platforms such as OpenStreetMap (OSM), spatial data's rational use requires advance knowledge of its quality. To know this quality, the application of official metrics is common. In general, the use of official metrics requires that the investigated data compared with spatial reference data. In this approach, official reference data is considered more reliable. In developing countries, however, where the lack of updated data and the restrictions on access to official reference data do not allow to apply comparative methods, this kind of process is complicated. Moreover, if it is precisely the lack of official and reference data that motivates the search for Voluntary Geographic Information (VGI), the classical approach defined by the official metrics for assessing the quality of spatial data is not suitable in such cases.