[Qgis-user] convert point data to color gradient

[Andreas Neumann]

Hi,

This is not a conversion. This is interpolation. There are many
different interpolation methods available.

GRASS and SAGA provide these interpolation methods. I would have a look
grass v.surf.rst - I had good results with this method.

If your data points would be very dense you could try the QGIS heatmap
plugin - but I have the impression that your data may be rather sparse
and hence would have to do interpolation.

Have a look at the different interpolation methods that GRASS and Saga
provide.

Good luck,
Andreas

Am 13.06.2014 12:55, schrieb Stephen Leake:
> I'm using Qgis 2.2.0-Valmiera 64 bits, on MS Windows 7.
> 
> I'm just getting started with Qgis, and GIS in general.
> 
> I'm trying to create a map similar to
> http://nadp.sws.uiuc.edu/maplib/pdf/mdn/hg_Conc_2011.pdf, with updated
> data, and for Kansas only.
> 
> I have data in an MS Excel spreadsheet; I can import that to QGIS via a
> .csv intermediate.
> 
> Now I need to convert that point data into a color gradient. 
> 
> I found Processing | SAGA | Grid - visualization | color blending, but
> when I run it, the log just says "error"
> 
> Any suggestions?
>