Lab5- Variowin Basics.ppt

Download variowin.zip from

http://www-sst.unil.ch/research/variowin/#DOWNLOAD

Basics for using Variowin

Variowin 2.21Installation

unzip variowin.zip in a temp directoryrun Install.exe to get the bellow variowin 2.2 folder

Variowin 2.21Prevar2D Module

Prevar2D – A program for computing a 2D pair comparison file from a Geo-EAS data file


Example.dat - Geostatistical Environmental Assessment Software 5 EastingNorthingArsenic ppm G16.9 stored in columns 21-30. Cadmium ppm F10.3 Also, notice the 'ROW Identifier' below. ThisLead ppm F10.3 is not counted as a variable (must use quotes) 288.0 311.0 .850 11.5 18.25 'Sample 1' 285.6 288.0 .630 8.50 30.25 'Sample 2' 273.6 269.0 1.02 7.00 20.00 'Sample 3' 280.8 249.0 1.02 10.7 19.25 'Sample 4' 273.6 231.0 1.01 11.2 151.5 'Sample 5' 276.0 206.0 1.47 11.6 37.50 'Sample 6' 285.6 182.0 .720 7.20 80.00 'Sample 7' 288.0 164.0 .300 5.70 46.00 'Sample 8' 292.8 137.0 .360 5.20 10.00 'Sample 9' 278.4 119.0 .700 7.20 13.00 'Sample 10' 360.0 315.0 .050 3.90 21.25 'Sample 11'

Opening an Input File (.dat)

Click on the Open option of the File menu of Prevar2D to get the File Open window. Chose a .dat file and Click on the OK button of this window.

Partial Contents of the Example.dat file


Setting XY Coordinates

Click on the XY-Coordinates… of the Settings menu option. Choose X and Y coordinates and press OK button.

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Setting Limits

Click on the Limits… of the Settings menu option. Choose the Attribute name and press the Apply and then the Exit button.


Prevar2D – A program for computing a 2D pair comparison file from a Geo-EAS data file

Running Prevar2D

Press the Run! option of the Prevar2D window menu in order to create the .pcf (Pair Comparison File) file that will be used as input for the Vario2D with pcf Module

Variowin 2.21Vario2D Module


Opening a .pcf file

In the Open option of the File menu choose a pcf file to be used for creating variograms. Press OK after the file was choosen.

Setting variogram parameters

Click on the Settings… option of the menu bar to open the Settings window. Click on the options you want to use as settings for the variograms’ creation. Click on the Apply button to end your choices.




Variowin 2.21Model Module


Opening a .var file

In the Open option of the File menu choose a variogram file (.var) to be used for model the variograms. Press OK after the file was choosen.

Choosing the variogram

Choose one variogram of the list that appears in the Experimental variograms window. Press OK button after your choice.


Setting model parameters

Click on the Settings… option of the menu bar to open the Settings window. Click on the options you want to use as settings for the variograms’ model. Click on the Apply button to end your choices.


Modeling the experimental variogramModeling the Variograms

Click on the Model option of the menu bar of the Model Window

Change Parameter values to model the experimental variograms

Try to find a modeled variogram with a good fit, small Nugget, Sill next to the global Covariance and a reasonable Range

Click on Store button to store the variogram modeled parameters

Variowin 2.21Grid Display Module

Variowin 2.21

EXAMPLE WITH ELEVATION DATA

FROM CANCHIM REGION

USING RESIDUAL ELEVATIONS


Opening an Input File (.dat)

Click on the Open option of the File menu of Prevar2D to get the File Open window. Chose a .dat file and Click on the OK button of this window.

Partial Contents of the elevfilt.dat file


Settings

XY Coordinates,

Limits and

Run !


Opening a .pcf file

In the Open option of the File menu choose a pcf file to be used for creating variograms. Press OK after the file was choosen.

Setting variogram parameters

Click on the Settings… option of the menu bar to open the Settings window. Click on the options you want to use as settings for the variograms’ creation. Click on the Apply button to end your choices.


Displaying Variogram Surfaces

Choose Variogram Surface… of the Calculate option of the Vario2D menu. Choose a Variable Name, set other window parameters and press the OK button tho show the Variogram Surface.


Displaying Directional Variograms

Choose Directional Variogram… of the Calculate option of the Vario2D menu. Choose a Variable Name, set other window parameters and press the OK button tho show the Variogram.


Saving the Variogram File

Choose Save As… of the File option of the Vario2D menu. Type a name in the Filename: text field. Press the OK button to save the .var file in the current Directory. The saved file will have a table format and will contain the variogram and its associated values (means and variances)


Opening a .var file

In the Open option of the File menu choose a variogram file (.var) to be used for model the variograms. Press OK after the file was choosen.

Choosing the variogram

Choose one variogram of the list that appears in the Experimental variograms window. Press OK button after your choice.


Setting model parameters

Click on the Settings… option of the menu bar to open the Settings window. Click on the options you want to use as settings for the variograms’ model. Click on the Apply button to end your choices.


Modeling the experimental variogram – Exponencial ModelModeling the Variograms






Modeling the experimental variogram – Spherical ModelModeling the Variograms






Modeling experimental variograms – Exponential Models – VarioWin and SPRING

Nugget Effect = 2.3, Range = 980.75, Sill = 198.83,

Documents

Lab5- Variowin Basics.ppt