[Qgis-user] qgis - run interpolation on table and selected attribute

[Nicolas Cadieux]

Hi,
You can easily make a query then when you save the file, you can specify that you wish to save only the selected points.

You may have some difficulty with the interpolation.  I suggest you use gdalDem or Saga for this interpolation. Nearest neighbor will be the fastest interpolation method. If you can handle that may points or have thousands of files to deal with (LiDAR), contact me again.  Csv files, Python scripting and GDAL will be useful in those situations.  Cloud Compare will also excel at dealing with so many points.

Nicolas

> Le 27 oct. 2018 à 17:57, Francois Chartier <fra.chartier at gmail.com> a écrit :
> 
> Hi, 
> 
> I have a large data set 180k points consisting of XYZ and attribute, and i would like to interpolate the attribute at certain elevations only.
> i have created separate tables for the given elevations outside of qgis and then imported it and interpolate. 
> I think that one should be able to run a query and interpolate values based on the query result, or create a new data set, export query result into a new table in qgis, and then interpolate.  Is this possible?
> 
> Thanks, 
> F
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