[Qgis-user] Ordinary Kriging in QGIS

[Andreas Neumann]

Hi, 

I suggest discussing these issues on the SAGA mailing list. QGIS is just
the frontend software in this case. 

All questions around the particular implementation should be discussed
with SAGA developers. 

Greetings, 

Andreas 

On 2018-06-28 08:51, Falk Huettmann wrote:

> Hi all, 
> 
> Just now it comes to my attention (sorry):
> 
> last years I went to a statistical session where the ESRI coders of the krigging module 
> talked about 'issues' of the implementation there, and it was beyond scary for me 
> (=>assumptions, merging outputs, edge issues etc. Krigging as such is pretty sensitive to 
> underlying assumptions and data). 
> 
> So my question is:  
> what is the science-basis for krigging in QGIS ? 
> 
> Or asked other way round:  
> how can it be assured that the krigged results are meaningful and correct ? 
> 
> If there is none of such metrics to assure it, then it's just another of the many 
> shiny tools and 'homebrews' (not peer-reviewed and QA'ed really) out there that mis-inform. 
> 
> Like well-shown with home range analysis, kernels, random number generators, optimizations and many predictions and model 
> selection tools, one may then ignore those outputs for a serious analysis. 
> 
> The initial idea of open source was arguably that those things can be tested, and improved, yes ? 
> 
> I am open to hear feedback, examples and ideas for a betterment. 
> 
> Thanks so much; kind regards 
> Falk Huettmann 
> 
> On Wed, Jun 27, 2018 at 11:39 PM, PARESH CHAUKHANDE <paresh.chaukhande at gmail.com> wrote:
> 
>> Hello, 
>> I am using QGIS v3.0.3 on macOSX(High Sierra).  
>> I want to do ordinary kriging in QGIS. 
>> I have 13 data points representing a state of yield attributes of agricultural crops. I am also having .shp files of states. I am doing following steps: 
>> Processing> Toolbox> SAGA> Ordinary Kriging. The process runs OK and two new layers are created called Quality Measure and Prediction, but both these layers are invisible or show no information. 
>> Kindly help me on these issues. 
>> Thank you. 
>> 
>> Sincerely yours, 
>> 
>> PARESH CHAUKHANDE 
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