Glossary for Geospatial Science

interpolation:  Applying mathematical estimation techniques to sets of numbers to find intermediate values.  Interpolation is a collective term for various techniques of determining an approximate value of a function at a point in the domain between given points at which the function values are known.  Bilinear interpolation, for example, is based on the presumption that the value being sought lies on or near a straight line joining two known values.  (See also: convolution.)