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"2034558 2867380 Unequal number of points in the two grids
while executing executing grp ext ref referencegrid"
int [par] [poi points] [cpo closedpolygons] [ext]
Interpolate a grid inside holes in the grid. Input is a grid.
par - Will use the parabolic average algorithm.
poi points - Interpolate only holes where a point is present in workspace data points
cpo closedpolygons - Interpolate only holes where a closed polygon is present in workspace data closedpolygons.
ext - will first perform interpolation to fill in interior holes; then extrapolation to extrapolate until grid frame.
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