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Inverse Distance

Inverse Distance is calculated by taking weighted average of the value of the point to be estimated and composite data to be used in estimating this point. Weights are calculated inversely proportional to the distance between the point to be estimated and composite data. This proportion degree is determined with alpha parameter. Alpha can take values between 1 and k. The more the value of this parameter, the closer it gets to nearest adjacent method. 

OptionDescription
Active Project FeaturesFeature: Attribute to be estimated is chosen. Atrribution tab within Project Attributes window is used to assign attribute information to the project. If attribute information is not added to the project; no selection can be made from this list.
Create Geostatistic (Reverse Distance)

Distance: means the radius of the sphere from which the samples shall be chosen. If the variable to be estimated is anisotropic, samples should be chosen from inside of an ellipsoid instead of a sphere with a "distance" radius. The geometry of the ellipsoid (axis lengths (radius) and angles) can be determined with variogram analysis. 

Is it ellipse/ellipsoid?: If this option is activated; no distance value is used. Therefore, only radius values are entered. 

Maximum Number of Neighbor: Maximum number of samples to be used in an estimation of a point or block. 

Alpha: Alpha value can practically be taken as 1 or 2.  The more the value, the closer it gets to nearest adjacent method.

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