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IDL natural neighbor interpolation for 3D irregular grid onto 3D scattered points [message #72780]

Wed, 06 October 2010 08:58

asdf
Messages: 7
Registered: August 2010

Junior Member

I have a 3D irregular spaced grid with scalar data defined at each
point ( x,y,z, and f(x,y,z) ). I want to interpolate to find the value
at very specific points. I was hoping to avoid interpolating the
irregular grid onto a regular grid, then interpolating at the values
with something like interpolate. I have read "Natural Neighbor
Interpolation" is a convenient algorithm to do what I want, but I
can't find anything in IDL to implement it with 3D irregular grid data
onto 3D scattered data. GRIDDATA seems to only interpolate onto a
regular grid (and I'm not sure if it would handle the irregular input
grid, as it is not on a sphere). It seems like IDL has all of the
right pieces (qhull for the Delaunay triangulation and Voronoi
diagram), just wondering if someone has already put all of those
pieces together.

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IDL natural neighbor interpolation for 3D irregular grid onto 3D scattered points

By: asdf on Wed, 06 October 2010 08:58

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