Defining Model Parameters for several values of cutoff

This window allows the verification and modification of structural parameters that compose each adjustment model of a set of cutoff values to be used by the SPRING analysis functions Kriging by Indication and Kriging by Simulation.


Defining Model Parameters:

  • Choose a value for cutoff from the labeled list. After that, the other fields from the Model Parameters window will be automatically updated;
  • Define a value of global probability, for the cutoff value selected, typing this value at the Global Prob. field. Each cutoff value must have a global probability between 0 and 1. The sum of global probabilities associated to the cutoff values must be equal to 1;
  • Define the Number of Structures (1, 2 or 3). Observe that the fields corresponding to the number of structures are enabled accordingly;
  • Define a value for for Nugget Effect;
  • For each structure, define the Type of model: Spherical, Exponential, Gaussian or Power.
    • for the types Spherical, Exponential and Gaussian, define the values for Contribution, Anisotropy Angle, Maximum Range and Minimum Range. If the model is isotropic, the Minimum and Maximum Range values are equal (check the Data Report screen) and the Anisotropy Angle assumes any value, for instance zero.
    • if you choose Power, define values for Slope Coefficient, Anisotropy Angle, Exponent and Minimum Range;
  • press the button Update in case any parameter has been modified and the semivariogram model will be saved to be used at Kriging by Indication or Kriging by Simulation.
  • press the button Delete if you want to delete the semivariogram model associated to the current cutoff value. Press the button Update to really delete;
  • press the button Close to get out of the Model Parameters window.


See also:
SPRING - Spatial Analysis
The adjusting Theoretical Models for the experimental variogram
Semivariogram Generation - Unidirectional Analysis
Semivariogram - Modeling or Adjustment