[Qgis-user] distance of point to line for large dataset

[Nicolas Cadieux]

Hi, 
Have you tried the various tools in the pool processing toolbox?  Occasionally, these tools are much faster than the standard tools offered in the Qgis vector menu. You could also try Grass or Saga directly. The later has a smaller learning curve. Both are installed with Qgis. 
You could try with a smaller dataset (like a 100 points and 100 lines) and test the speed then select the fastest algorithms.  Patience could be necessary for such data sets.  
If you are good at Python, you are likely to get a faster answer using Fiona and Shapely directly. 
Good luck 
Nicolas 
On Jul 12, 2016 23:51, "Michael.Dodd [via OSGeo.org]" <ml-node+s1560n5276061h52 at n6.nabble.com> wrote: 

	






I am trying to calculate the distance from points to vector lines.  There are various ways of doing this when there are relatively few points and lines but my datset has 200,000 points and a large network of vector lines and none of the tools I have tried
 in qgis seem to get anywhere. I have also tried converting the lines to raster but not clear what resolution to use and with high resolution the problem also seems to be that it takes forever to do the calculation.  If the tools gave an indication as to how
 long it is likely to take that would be a help e.g. 12 hours but waiting 12 hours on the chance that somethign might happen and still nothing is very frustrating. 




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