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TitreAn IBM-compatible program for interactive three-dimensional gravity modeling
AuteurBroome, J
SourceComputers and Geosciences vol. 18, no. 2-3, 1992 p. 337-348,
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 33791
ÉditeurElsevier BV
Documentpublication en série
Mediapapier; en ligne; numérique
Sujetsinfographie; simulations par ordinateur; applications par ordinateur; logiciel; modèles de la pesanteur; établissement de modèles; géomathématique; Sciences et technologie
Illustrationsflow charts; diagrams
Résumé(disponible en anglais seulement)
G3D is a 3-D interactive gravity modeling program for IBM-compatible microcomputers. The program allows a model to be created interactively by defining multiple tabular bodies with horizontal tops and bottoms. The resulting anomaly is calculated using Plouff's algorithm at up to 2000 predefined random or regularly located points. In order to display the anomaly as a color image, the point data are interpolated onto a regular grid and quantized into discrete intervals. Observed and residual gravity field images also can be generated. Adjustments to the model are made using a graphics cursor to move, insert, and delete body points or whole bodies. To facilitate model changes, planview body outlines can be overlain on any of the gravity field images during editing. The model's geometry can be displayed in planview or along a user-defined vertical section.
G3D is written in Microsoft® FORTRAN and utilizes the Halo-Professional® (or Halo-88®) graphics subroutine library. The program is written for use on an IBM-compatible microcomputer equipped with hard disk, numeric coprocessor, and VGA, Number Nine Revolution (Halo-88® only), or TIGA® compatible graphics cards. A mouse or digitizing tablet is recommended for cursor positioning.
Program source code, a user's guide, and sample data are available as Geological Survey of Canada Open File (G3D: A Three-dimensional Gravity Modeling Program for IBM-compatible Microcomputers).