1. Geospatial big data: Challenges and opportunities;Lee;Big Data Res.,2015
2. Shapely: manipulation and analysis of geometric objects;Gillies,2007
3. Planet dump retrieved from;OpenStreetMap contributors,2017
4. Shortest path calculation: A comparative study for location-based recommender system;Mahmoud,2016
5. Real-time routing with OpenStreetMap data;Luxen,2011