Processing System for Two-dimensionally Distributed Data : (2) Interpolation for Irregularly Distributed Data

Abstract

Computer programs estimating interpolated values on the regularly spaced grid points from irregularly distributed data are presented. We use an algorithm developed by Akima (1978) for the procedure. The algorithm can be divided into two part : (1) triangulation of irregularly spaced data points, and (2) polynomial surface fitting in every triangle. Corresponding theseprocesses, two computer programs are written both in C and FORTRAN77.