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<p>Hi,</p>
<p>I suggest discussing these issues on the SAGA mailing list. QGIS is just the frontend software in this case.</p>
<p>All questions around the particular implementation should be discussed with SAGA developers.</p>
<p>Greetings,</p>
<p>Andreas</p>
<p>On 2018-06-28 08:51, Falk Huettmann wrote:</p>
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<div dir="ltr">Hi all,
<div> </div>
<div>Just now it comes to my attention (sorry):<br />
<div><br />
<div>last years I went to a statistical session where the ESRI coders of the krigging module</div>
<div>talked about 'issues' of the implementation there, and it was beyond scary for me</div>
<div>(=>assumptions, merging outputs, edge issues etc. Krigging as such is pretty sensitive to</div>
<div>underlying assumptions and data).</div>
<div> </div>
<div>So my question is: </div>
<div>what is the science-basis for krigging in QGIS ?</div>
</div>
<div> </div>
<div>Or asked other way round: </div>
<div>how can it be assured that the krigged results are meaningful and correct ?</div>
<div> </div>
<div>If there is none of such metrics to assure it, then it's just another of the many</div>
<div>shiny tools and 'homebrews' (not peer-reviewed and QA'ed really) out there that mis-inform.</div>
<div> </div>
<div>Like well-shown with home range analysis, kernels, random number generators, optimizations and many predictions and model</div>
<div>selection tools, one may then ignore those outputs for a serious analysis.</div>
<div> </div>
<div>The initial idea of open source was arguably that those things can be tested, and improved, yes ?</div>
<div> </div>
<div>I am open to hear feedback, examples and ideas for a betterment.</div>
<div> </div>
<div>Thanks so much; kind regards</div>
<div> Falk Huettmann</div>
<div> </div>
<div> </div>
</div>
</div>
<div class="gmail_extra"><br />
<div class="gmail_quote">On Wed, Jun 27, 2018 at 11:39 PM, PARESH CHAUKHANDE <span><<a href="mailto:paresh.chaukhande@gmail.com">paresh.chaukhande@gmail.com</a>></span> wrote:<br />
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<div style="word-wrap: break-word; line-break: after-white-space;">Hello,
<div> I am using QGIS v3.0.3 on macOSX(High Sierra). </div>
<div> I want to do ordinary kriging in QGIS.</div>
<div> 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:</div>
<div> <span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);">Processing> Toolbox> SAGA> </span><span class="m_-57947414962710718result-highlight" style="margin: 0px; padding: 0px; border: 0px; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-weight: bold; font-stretch: inherit; line-height: inherit; font-size: 13px; vertical-align: baseline; box-sizing: inherit; color: #0c0d0e; background-image: none;">Ordinary</span><span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);"> </span><span class="m_-57947414962710718result-highlight" style="margin: 0px; padding: 0px; border: 0px; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-weight: bold; font-stretch: inherit; line-height: inherit; font-size: 13px; vertical-align: baseline; box-sizing: inherit; color: #0c0d0e; background-image: none;">Kriging</span><span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);">. 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.</span></div>
<div><span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);"> Kindly help me on these issues.</span></div>
<div><span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);"> Thank you.</span></div>
<div><span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);"> </span></div>
<div><span style="color: #3b4045; font-family: Arial,'Helvetica Neue',Helvetica,sans-serif; font-size: 13px; background-color: rgba(248,248,248,0.6);"> </span></div>
<div><span style="color: #3b4045; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: small;"><span>Sincerely yours,</span></span></div>
<div><span style="color: #3b4045; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: small;"><span> </span></span></div>
<div><span style="color: #3b4045; font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: small;"><span>PARESH CHAUKHANDE</span></span></div>
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