I have a line layer (representing a pipeline) and a points layer (representing valves) and I would like to calculate the chainage of the valves along the pipeline.
I assume that I would first need to 'snap' the points to the line in order to calculate chainage as they do not currently lie directly above the line. However I would need to use a bulk tool if possible as there are several hundred points and would take too long to do manually.
I wondered whether the LRS tool in QGIS could be used to derive chainage?
I am using QGIS 2.2, GRASS & Postgis.
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