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Specifies how the values of the geopoints with in the window around a resulting grid point will be combined to produce the resulting value. The available algorithms are:
- Reciprocal: the mean of the values are , weighted by the inverse of their distance from the target point. If one of the geopoints lies exactly on the target point then its value is used.
Exponential Mean: computes the mean of the following:
if Threshold is not zero:
Mathinline e^{-distance/tolerance^2}- if Threshold is zero: 1 if the point is on the target point, 0 otherwise
- note that this method, combined with setting Threshold to zero computes the proportion of points which lie exactly on the target point
- Exponential Sum: performs the same computation as Exponential Mean, but does not finally divide by the total weight. With a Threshold of zero, this method will compute the number of input points that lie exactly on each target point.Exponential sum: