Dictionary:Bilinear interpolation

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(bī lin’ ē ∂r) A 2D interpolation method in which values are first interpolated in one direction and then in the orthogonal direction. Computer programs often interpolate stacking velocity in this way, first interpolating in time between picks at velocity analysis points and then spatially between velocity analysis locations. This may create discontinuities in the gradient. Also called bidirectional gridding.

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Bilinear interpolation
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