Algorithm 751: TRIPACK: a constrained two-dimensional Delaunay triangulation package
ACM Transactions on Mathematical Software (TOMS)
Algorithm 752: SRFPACK: software for scattered data fitting with a constrained surface under tension
ACM Transactions on Mathematical Software (TOMS)
Algorithm 761: Scattered-data surface fitting that has the accuracy of a cubic polynomial
ACM Transactions on Mathematical Software (TOMS)
Algorithm 792: accuracy test of ACM algorithms for interpolation of scattered data in the plane
ACM Transactions on Mathematical Software (TOMS)
Remark on Algorithm 761: scattered-data surface fitting that has the accuracy of a cubic polynomial
ACM Transactions on Mathematical Software (TOMS)
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Several inprovements to algorithm 761 are presented. The problems corrected consist of (1) the computation of a determinant in subroutine SDLEQN may result in overflow, (2) subroutine SDTRCH may fail to correctly determine the set of boundary edges, (3) subroutine SDTRTT, which removes long thin triangles from the boundary in order to improve the accuracy of extrapolation, may remove too many triangles, and (4) the nodal derivative estimation procedure, SDPD3P, often fails to achieve cubic precision.