Saturday, 30 September 2017

qgis - How to access the road graph plugin in python?


I am developing a few scripts in Python for QGIS 1.8 to automate some geo-tasks and one of them would be to calculate the shortest distance from a hospital to each building in a town.


I would like to take advantage of the already existing Qgis plugin but, as it is a C++ plugin, I am not sure whether it is possible to access it from Python? Is there a binding or a trick for that?


If not, any further advice would be appreciated! As the base data is OpenStreetMap data stored in a PostGIS DB, I may also try with pgRouting. But the QGIS plugin would be my favourite choice if possible.


PS: this question is close to this one: Is there a way to access QGIS plugins in Python? but I believe it's still different enough to be worth a new thred.



Answer




gis-lab.info has a tutorial on using the network analysis library in QGIS using Python. It's not in English but Google Translate should be able to make it comprehensible. Good luck!


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