Interpolate 2D points with arbitrary values.
Given a non-uniform distribution of 2D points *KnownPoints*,
each representing a unique set of one or more values
*KnownValues*, return the unknown values for each desired
point as vector *DesiredPoints*. Populates the array
*Results*, of rows equal to *KnownValues* and length
equal to *DesiredPoints*. Points lying outside boundary are
mapped to nearest in-boundary neighbor if *Remap* is true.

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