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I have an an certain area contains less than 200 roads(polylines), and I need to calculate a shortest path between two specified points inside the area.

I know maybe I can use the pgroute in postgis to do the calculation, however I wonder if there is an alternative to use common database like mysql instead of spatial database since the dataset is not large enough?

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  • I don't think MySQL supports shortest-path algorithms. However, it is pretty straightforward to implement Djikstra's algorithm, here is a Python solution, if you want to avoid pgrouting.
    – John Powell
    Jun 1, 2015 at 14:03
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    How are you storing polylines without a spatial database? Why use the postgis tag if you wish a mysql solution?
    – Martin F
    Jun 2, 2015 at 4:11

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If you load your data into qgis you can find the shortest path with this plugin: http://docs.qgis.org/1.8/en/docs/user_manual/plugins/plugins_road_graph.html

I don't know what is your source dataset, but into qgis you can import many of different gis file formats and also you can connect to spatial databases.

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