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aave: Maps which compute a common refinement (intersection) mesh and then integrate a piecewise-constant reconstruction.
can be produced by: ESMF, NCO and TR/MBTR
pros: conservative, montonone, cell averaging good for fine-to-coarse maps.
cons: 1st order accurate, not suitable for coarse-to-fine maps (blocky results)
examples: esmfaave, ncoaave, traave
bilin: bilinear interpolation
can be produced by: ESMF, TR/MBTR
pros: monotone, 2nd order accurate
cons: non-conservative. not suitable for fine-to-coarse maps (aliasing errors)
examples: esmfbilin, trbilin
patch: patch based algorithm (L2 projection?).
can be produced by: ESMF only
pros: accurate. good for coarse-to-fine maps. not sure how it performance on fine-to-coarse maps.
cons: can have small non-monotone weights
examples: esmfpatch
intbilin: (TR/MBTR) Integrated bilinear or trilinear
can be produced by: TR, MBTR only.
pros: monotone, 2nd order, good for fine-to-coarse and coarse-to-fine maps.
cons: may have some issues when source grid has holes.
examples: trintbilin, mbtrintbilin
What’s the new map used for nonlinear tweaks needed for trigrid? I think TR’s “np2” - 2nd order FV?
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