: Astronomie: multivariate interpolation

mathematical technique > numerical method > multivariate interpolation

multivariate interpolation

In numerical analysis, multivariate interpolation is interpolation on functions of more than one variable; when the variates are spatial coordinates, it is also known as spatial interpolation. The function to be interpolated is known at given points (x_i, y_i, z_i) and the interpolation problem consists of yielding values at arbitrary points ( x , y , z , … ). Multivariate interpolation is particularly important in geostatistics, where it is used to create a digital elevation model from a set of points on the Earth's surface (for example, spot heights in a topographic survey or depths in a hydrographic survey). (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Multivariate_interpolation)

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