[Qgis-developer] Kriging interpolation functionality in QGIS?

[Werner Macho]

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Hi Stefan,

My post was in no way meant offending. I replied to Victor and Barry
just because of the nice joke about "wizards".
My experience at university is just that a lot of students use
"wizards" without knowing what they are doing and Barrys post
described exactly what I saw at university.

I hope you will find (or already found) what you are looking for.
With Kriging unfortunately I cannot help you because I just did not
understand it ;)

regards,
Werner

On 28/09/15 20:32, Stefan Keller wrote:
> Werner, Barry
> 
> I just wrote to have Kriging in QGIS with less external
> *dependencies* like GRASS, SAGA (or R). That's what I meant by
> "easier to use" in my initial thread.
> 
> Then I challenged the benefit of Kriging versus IDW just because I 
> don't want to use it because it's cool. Thanks to Barry and others
> for the explanations.
> 
> The use case you obviously have in mind, is to do data analytics as
> a researcher or informed user - which requires the steps Sjur
> mentioned (many thanks too).
> 
> On the other hand, to me it's still worth thinking of a helper
> dialog (in whatever implementation and whatever you call it) which
> suggests parameters calculated on cross validation.
> 
> ... Unless you are saying that only statisticians can ever master
> Kriging :-O
> 
> :Stefan
> 
> 
> 
> 2015-09-28 17:34 GMT+02:00 Werner Macho <werner.macho at gmail.com>:
>> Well written and I fully support that. Sometimes it seems that
>> people want a wizard for everything (and a computer that can read
>> their mind). I am against imitating everything that "commercial
>> software" provides. Sometimes it is better to treat users to
>> switch on their brain. For me that is still the point that
>> separates Opensource Software from proprietary one. I am not sure
>> if we should try to get more users at all cost. Let's do things
>> correct - even if that is not always popular (because it is not 
>> in reach with one click).
>> 
>> just my 2c Werner
>> 
>> On Mon, Sep 28, 2015 at 1:37 PM, Barry Rowlingson 
>> <b.rowlingson at lancaster.ac.uk> wrote:
>>> On Mon, Sep 28, 2015 at 10:35 AM, Victor Olaya
>>> <volayaf at gmail.com> wrote:
>>> 
>>>> From the point of view of user-friendliness, the Processing 
>>>> implementation (wrapping the corresponding SAGA modules),
>>>> might not be as easy to use as some people would like, but
>>>> for tools such as kriging I am strongly against wizard-like
>>>> UI's and similar elements. ArcGIS's Statistical Analyst is
>>>> great and has a wizard with a fantastic "next" button that
>>>> allows you to interpolate using all sort of esoteric methods
>>>> and will make you believe that you are creating sound raster
>>>> layers...when the truth is that, without knowledge, you are
>>>> creating rubish. I don't like to give users that wrong
>>>> sensation.
>>> 
>>> Agreed. Anything claiming to be a "wizard" for Kriging really
>>> needs to be a psychic wizard that can read your thoughts and
>>> understand your data. A better device would be an
>>> "Interrogator":
>>> 
>>> *ping* Your data seems to be discrete small integers, are you
>>> sure you want to model it as a Gaussian? [*yes*/no]
>>> 
>>> *ping* So you want to model your data with Gaussian cofactor
>>> response p-value thresholds from an underlying Bayesian
>>> surface? [*yes*/no]
>>> 
>>> *ping* That last question was nonsense. You're just clicking
>>> "yes" until you get a surface model - any surface model -
>>> right? [*yes*/no]
>>> 
>>> *ping* okay, at least you are honest. I'm deleting the kriging
>>> module now, go find a statistician.
>>> 
>>> Barry _______________________________________________ 
>>> Qgis-developer mailing list Qgis-developer at lists.osgeo.org 
>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>> _______________________________________________ Qgis-developer
>> mailing list Qgis-developer at lists.osgeo.org 
>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
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