Mapping package and surface interpolation / approximation - Windows Shareware $20. SurGe is a computer program which enables to generate surface as an interpolation (approximation) function of two independent variables. The program has the following basic features: > Implements an interpolation / approximation method called ABOS. > Basic input is a simple ASCII file containing X, Y and Z coordinates of points irregularly spaced in some region.

> The surface can be defined not only by points, but also by spatial (three-dimensional) polylines. > So called fault lines can define discontinuity in generated surface. > Generated surface can pass through points exactly or can be approximative. > Smoothness of resulting surface can be controlled by one parameter. > Large data sets (with noise) can be effectively filtered. > Quality of resulting surface is comparable with surface created by Kriging or Minimum curvature method.