关键词: OSM, 多层次, 多粒度, 数据质量, 评价指标体系, 模糊综合评价

Abstract:

OpenStreetMap (hereinafter short for OSM) data quality evaluation only considered the one-sided evaluation index or single level assessment of the object. This paper takes the authoritative data of government planning agency as the reference data and designs a data quality assessment model of OSM road network at a multi-level and multi-granularity scale. This model is based on the method of fuzzy integrated evaluation and is the combination of quality evaluation index and spatial level. From three aspects: single target, group goals and overall goals, this paper builts the evaluation indexes system of data quality and sets the control of number of individual and group structure in one, then sovles the crucial technical problems, such as the determining of membership function and the optimal combination weight. This paper also achieves the combinations of macro and micro, global and local. The results show that OSM data qualities of the single level and the overall level are superior. The group level is the general. The qualities of the single target and most indexes of group goal are superior so that it’s consistent and logical that the overall level is superior. This shows the method is feasible and practical. Some industries which are based on VGI data source can use this empirical basis and reliable data quality evaluation method for reference.

Key words: OSM, multi-level, multi-granularity, data quality, evaluation indixes system, fuzzy integrated evaluation