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E{Z}-KrigingExploring the World of Ordinary Kriging
Dennis J. J. Walvoort
Wageningen University & Research CenterWageningen, The Netherlands
July 2004 (version 0.2)
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
What is it about?Potential Users
What is E{Z}-Kriging?
a computer program for exploring ordinary kriging;
interactive, self-explanatory, and easy to use.Hence, easy kriging
and last but not least: its freeware!
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
What is it about?Potential Users
What is E{Z}-Kriging?
a computer program for exploring ordinary kriging;
interactive, self-explanatory, and easy to use.Hence, easy kriging
and last but not least: its freeware!
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
What is it about?Potential Users
What is E{Z}-Kriging?
a computer program for exploring ordinary kriging;
interactive, self-explanatory, and easy to use.Hence, easy kriging
and last but not least: its freeware!
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
What is it about?Potential Users
Who may benefit from it?
1 Students, who need to understand those mysterious krigingequations;
2 Lecturers, who want to explain kriging in an intuitive way;
3 Others, who just want to know what they are doing whenusing geostatistical software.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
What is it about?Potential Users
Who may benefit from it?
1 Students, who need to understand those mysterious krigingequations;
2 Lecturers, who want to explain kriging in an intuitive way;
3 Others, who just want to know what they are doing whenusing geostatistical software.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
What is it about?Potential Users
Who may benefit from it?
1 Students, who need to understand those mysterious krigingequations;
2 Lecturers, who want to explain kriging in an intuitive way;
3 Others, who just want to know what they are doing whenusing geostatistical software.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Graphical User Interface (GUI)
The GUI consists of threepanels:
1 data configurationpanel
2 semivariogram panel
3 kriging panel
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Graphical User Interface (GUI)
The GUI consists of threepanels:
1 data configurationpanel
2 semivariogram panel
3 kriging panel
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Graphical User Interface (GUI)
The GUI consists of threepanels:
1 data configurationpanel
2 semivariogram panel
3 kriging panel
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Graphical User Interface (GUI)
The GUI consists of threepanels:
1 data configurationpanel
2 semivariogram panel
3 kriging panel
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Data Configuration Panel
The prediction point isred and labelled 0.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Data Configuration Panel
The n sampling pointsare blue and labelledfrom 1 to n.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Data Configuration Panel
The configuration ofpoints can be changedby means of the mouse(drag n drop).
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Data Configuration Panel
The range isrepresented by a solidcircle. A dashed circlerepresents the practicalrange.
definition
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Data Configuration Panel
The number ofsampling points has tobe specified here (seeellipse).
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Data Configuration Panel
The values at thesampling locations haveto be entered here.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Semivariogram Panel
The followingsemivariogram modelscan be selected:
Spherical modeldetails
Exponential modeldetails
Gaussian modeldetails
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Semivariogram Panel
Use the sliders to setthe semivariogramparameters:
nugget (c0)
partial sill (c1)
range parameter (a)
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Semivariogram Panel
This section gives thenugget variance, the(practical) range and thesill variance (c0 + c1).
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Semivariogram Panel
The resultingsemivariogram will beshown here.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Kriging Panel
The ordinary krigingweights are shown asbars. Click on the barsfor numerical values.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Kriging Panel
Use the radiobuttons toswitch between ordinarypoint kriging andordinary block kriging.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Kriging Panel
The block size can beset by means of thesliders.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Kriging Panel
Check this checkboxto enforce squareprediction blocks.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Kriging Panel
The ordinary krigingprediction and theassociated variance ofthe prediction error aregiven here.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Data Configuration PanelSemivariogram PanelKriging Panel
Kriging Panel
Press this button toget a glimpse of theunderlying maths.
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Effects of sampling point configurationEffect of semivariogramEffect of aggregation
Interesting features to explore
Distance effect
Discover that points outside the rangeaffect predictions differently than pointswithin the range (cf. inverse squareddistance interpolation).
Dennis J. J. Walvoort E{Z}-Kriging
IntroductionGraphical User Interface
Interesting features to exploreConcluding Remarks
Effects of sampling point configurationEffect of semivariogramEffect of aggregation
Int
