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I have drawn some roads as polygon and I wish to know if it is possible to calculate how long the roads are.

I imagine that somehow QGIS can figure out the centerline of a polygon and create or calculate the length of the centerline.

I know It is possible to use measure tool but it is pretty inconvenient if you have many polygon roads drawn.

enter image description here

Babel
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Ludvig Petersen
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  • Maybe this can give a few ideas: https://gis.stackexchange.com/q/319412/88814 – Babel Aug 12 '21 at 20:49
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    Possible duplicates: 1. https://gis.stackexchange.com/questions/318721/creating-centerline-of-river-in-qgis 2. https://gis.stackexchange.com/questions/33887/finding-centrelines-from-polygons-in-qgis – Comrade Che Aug 24 '23 at 09:57

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You can utilize 'geosymplification' by searching and downloading through plugin installation. In chordal axis of geosymplification, compute the centerline though it and use field calculator to get the length of the centerline by entering '$length'.

user229618
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