I have a river network (lines) and a shp with states (polygon). I would like to split the lines at the state boundaries --> split lines by polygon boundaries.
Is there a geoprocessing tool to do this in QGIS? I can't merge the lines by the way, since they are meaningfully split into tributaries/ main river.
Answer
I have a processing model for that: https://github.com/falu/qgis-split-lines-by-polygons. It works only with qgis 2.4
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