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Evaluating the performance of map matching algorithms for navigation systems: an empirical study
Jaiteg Singh,Saravjeet Singh,Sukhjit Singh,Hardeep Singh 대한공간정보학회 2019 Spatial Information Research Vol.27 No.1
Navigation systems are extensively used for location identification and route finding. The efficiency of navigation systems is highly affected by map matching algorithms. This paper provides a review of major map matching algorithms. The performance of reviewed algorithms was further evaluated with the help of an empirical study. A dataset of forty seven kilometers was collected to deploy various map matching algorithms so as to measure their performance. A comparison of geometric, topological and Kalman filter based map matching algorithms was performed on the same dataset. It was concluded that performance of Kalman filter algorithm provide better results in comparison to geometrical and topological algorithms.
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Extending QGIS processing toolbox for assessing the geometrical properties of OpenStreetMap data
Sukhjit Singh Sehra,Jaiteg Singh,Sumeet Kaur Sehra,Hardeep Singh Rai 대한공간정보학회 2023 Spatial Information Research Vol.31 No.2
OpenStreetMap (OSM) offers an under-explored crowdsourced geospatial data useful to urban street network researchers for assessing the geometrical properties of spatial data. Urban street network analysis can provide the assessment of spatial dataset through these properties. The lack of a suitable evaluation framework renders problem for its potential users to evaluate the geometrical properties of the data. To overcome this difficulty, the capability of processing toolbox of QGIS has been extended by developing processing scripts using Python. These scripts were further used as components in the graphical modeler. The parameters such as degree centrality, average path length, closeness centrality, betweenness centrality, clustering coefficient, and inter-network indicators are developed to provide insights to the overall nature of the spatial data. For performing the empirical analysis, OSM dataset of five biggest cities of state of Punjab (India) have been analyzed and compared temporally. The results presented the internal geometrical feature’s evaluation of street network in temporal comparison of OSM dataset and its credibility. This study provided the basis for reproducible research by developing components for open source software QGIS. The developed model can be used to asses the geometrical properties assessment by the town planners to identify the prominent nodes, edges and their relationships in the datasets.
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