Matching OpenStreetMap Road Networks with Authority Data – a Polygon-based Approach

Matching road network is an essential step for data quality assessment by using reference data. Conventionally, road network from two data sets are matched by using line-based approach which checks the similarity of properties of line segments. In new method recently published in IJGIS, a polygon-based approach is proposed to match OpenStreetMap road network with authority data. The algorithm firstly extracts urban blocks that are central elements of urban planning and represented by polygons surrounded by their surrounding streets, then assigns road lines to edges of urban blocks by checking their topologies. In the matching process, polygons of urban blocks are matched in the first step by checking overlapping area. In the second step, edges of a matched urban block pair are further matched with each other. Road lines that are assigned to the same matched pair of urban block edges are then matched with each other. In this approach, the computation unit is substantially reduced because the proposed approach matches polygon instead of road lines, as shown in the figure. In this way, the process of matching is accelerated. Experiments on Heidelberg and Shanghai datasets show that the proposed approach achieves good and robust matching results, with a precision higher than 96% and a F1-score better than 90%.

Fan, H., Yang, B., Zipf, A., Rousell, A. (2015): A polygon-based approach for matching OpenStreetMap road networks with authority data. International Journal of Geographical Information Science (IJGIS), Taylor & Francis. DOI:10.1080/13658816.2015.1100732



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