Abstract
Advances in computer technology have made low-cost microcomputer workstations for geophysical interpretation feasible. Increased storage capacity and specialized graphics boards now enable inexpensive microcomputers to produce graphic output of a quality previously available only with larger and more expensive minicomputer systems. This paper describes a microcomputer-based workstation and software developed at the Geological Survey of Canada (GSC) for interactive display and enhancement of gridded data and gravity and magnetic profile modeling. The workstation consists of an IBM-compatible microcomputer, a high-resolution color graphics coprocessor and monitor, and a digitizing tablet for interactive control. GSC software for generating, displaying, and interactively manipulating color-intensity and shaded-relief images is described. A 2.5 dimensional (pseudo-3D) interactive modeling program for gravity and aeromagnetic data, termed MAGRAV2, also is described. Software is written in Microsoft FORTRAN 77 with calls to Multi-Halo graphics subroutines. Source code, user's guides, and sample data may be ordered from the GSC at nominal cost.
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