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AUTOMAG: Automatic depth to magentic source computation
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AutoMag is an important innovation in computer-based interpretation of magnetic data. It
bridges the gap between automated depth to magnetic source methods and pure interactive
modelling. AutoMag improves the quality and efficiency of depth to magnetic source
calculations. You can work with original flight line data or interactively extract
traverses from gridded data.
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AutoMag is tightly integrated into the ModelVision modelling environment to
achieve maximum synergy between the two products. It can be used to
process large surveys in batch mode or just focus on a single magnetic anomaly.
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AutoMag Applications
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Quick depth estimates on individual anomalies.
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Automated depth estimates along profiles.
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Overburden thickness studies to focus on shallow targets.
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Alluvial channel mapping for gold and groundwater
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Regional mapping of basins and grabens
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Cross-section analysis
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1st vertical derivative for improved depth accuracy and anomaly separation
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New Research
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AutoMag has been developed from new research into the Naudy based automatic
depth calculation method. Improvements include the introduction of first vertical
derivative computation, reduction to the pole, strike correction for depth, dip,
thickness and magnetic susceptibility. Further research is being undertaken to assist
with automatic parameter tuning
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What Distinguishes AutoMag from other products?
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Tight integration with forward and inverse modelling.
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A high level of interpreter confidence.
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Supplement automated results with forward models.
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Interactive user interface for tuning and visualization.
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Interactive and batch mode of operation.
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1st vertical derivative for depth accuracy and anomaly separation.
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Visualise Solutions
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AutoMag solutions and tuning parameters are displayed in a model cross-section.
Individual solutions have attributes of X, Y, Depth, Susceptibility, Thickness, Dip
and Azimuth. Use the mouse to convert selected solutions to a solid model for direct
computation of the magnetic response.
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Cross-Section Analysis & Tuning
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AutoMag replaces time consuming iterations using map products with an interactive
cross-section analysis procedure. The process can be tuned to each characteristic
to follow lateral changes in the depth of investigation and geology.
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Batch Operation
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Use the mouse to select regions for analysis and let AutoMag run in batch mode.
Run times for surveys are fast and typically range from 5 to 30 minutes on a Pentium PC.
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Filtering of Solutions
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Good tuning removes most spurious solutions, but an attribute filter can also be
applied to remove geologically implausible solutions. Dip, thickness, susceptibility
and depth can be used to reject extreme solutions prior to final editing and analysis.
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Map Presentation
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AutoMag solutions are displayed in map view along the flight lines with a choice of
magnetic stacked profiles, contours of the magnetic field or images of the magnetic field.
Symbols representing the solutions are modulated by properties such as depth, susceptibility and azimuth.
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Your final set of AutoMag points can be gridded and displayed as contour maps or images
of magnetic basement depth along with the annotated solutions. A geological assessment
of the solutions is then used to cull the odd spurious value or refine solutions through
modelling and inversion.
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Linking Solutions for Strike Adjustment
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In AutoMag, strike adjustment is achieved with the mouse by linking solutions along
the strike of an anomaly trend. From the new azimuth, a strike correction is
applied to depth, dip, thickness and susceptibility.
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Final Maps
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A contour map with depth annotations can be produced to scale in ModelVision.
You can include an image of the depth map or the total magnetic field as a backdrop to the presentation.
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Import/Export
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You can import AutoMag equivalent solutions from another program and refine
them in AutoMag (Release 1.4). Solutions from AutoMag can be exported as an
ASCII table for use in other presentation software.
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Supported Platforms
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AutoMag is available for IBM PC compatibles running Windows 3.1,
Windows 95 and Windows NT. Unix versions are supported for Sun on Solaris and Silicon Graphics on Irix 5 and 6.
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Please contact us at
for brochures and pricing
on any of the Encom Technology range of software
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Company Profile
