Computing the gravitational and magnetic anomalies due to a polygon: Algorithms and Fortran subroutines
- 1 February 1987
- journal article
- Published by Society of Exploration Geophysicists in Geophysics
- Vol. 52 (2) , 232-238
- https://doi.org/10.1190/1.1442298
Abstract
We present two algorithms for computing the gravitational and magnetic anomalies due to an n‐sided polygon in a two‐dimensional space. Both algorithms have been implemented as subroutines coded in Fortran-77, and listings are provided. Because references to trigonometric functions have been almost completely eliminated, these codes run substantially faster than mosts codes now in existence. Furthermore, anomalies can be computed at any point outside, on, or inside the polygon. Unlike other codes, these algorithms can be used to model subsurface observations.Keywords
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