[Qgis-developer] Kriging interpolation functionality in QGIS?

[Barry Rowlingson]

On Fri, Sep 25, 2015 at 6:46 PM, Stefan Keller <sfkeller at gmail.com> wrote:
> Hi Barry
>
> Many thanks for your explanations and hints.
> So from a pragmatic point-of-view ("80/20 pareto rule"):
> Do you think Inverse Distance Weighting (IDW) would do the job as well,
> since Kriging has so many parameters to fiddle around and to understand?

 Depends on what "the job" is. To get an impression of the overall
trend of a set of samples - IDW is probably fine. But to get a
*principled* (ie based on a statistical model) set of estimates over a
grid *with honest estimates of uncertainty* so you can answer
probabilistic questions (like "what's the chance that the soil over
there will contain 1ug gold/tonne?") you need something like kriging.

 Barry