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pythonosmnx

Change road network to bidirectional in osmnx

I wonder if I can set all road networks to bidirectional using osmnx? I hope it is bidirectional rather than undirected because I still hope to use some functions like osmnx.truncate. So osmnx.get_undirected(G) cannot help me.

I saw @gboeing mentioned this can be done by changing the global settings. But I am not sure how to do that. Two questions

  1. The global settings are stored in settings.py file. How can I create a new file and force osmnx uses the new settings.pyfile?

  2. If I want to make all edges bidirectional, can I just simply set bidirectiional_network_types=['all']?

Solution

  • The global settings are stored in settings.py file. How can I create a new file and force osmnx uses the new settings.pyfile?

    You can alter osmnx settings by setting variables within osmnx.settings. Example:

    import osmnx
osmnx.settings.bidirectional_network_types = ["walk", "drive"]

    If I want to make all edges bidirectional, can I just simply set bidirectiional_network_types=['all']?

    No, that will not work. The network type you are making bidirectional must match the network_type you're using in functions such as graph_from_address(). When it checks the bidirectional_network_types list, it checks it in the following fashion:

    bidirectional = network_type in settings.bidirectional_network_types

    In other words, the argument network_type must exactly match one of the entries inside bidirectional_network_types to be treated as a bidirectional network.