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        1. MEGS_Log version 3.3 Help

          1. Copyright notice and licence agreement

          2. How to contact MEGS_Log support

          3. What's new in MEGS_Log 3.3

          4. Concepts in MEGS_Log

            1. About boreholes, units and elements

            2. About geophysical traces

            3. About editing with the mouse and Editing Tools

            4. About Insert Modes

            5. About schemas

            6. About seams and plies

            7. About sample numbers

            8. About hatches

            9. MEGS_Log settings

            10. About the MEGS_Log configuration file

            11. About MEGS_Log licencing

          5. How to carry out common tasks within MEGS_Log

          6. Menus and commands

          7. Window elements and dialogs

          8. List of appendices

          9. MEGS_Log version 3.3 Help Index

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About geophysical traces

A geophysical trace is simply a recording of some sort of geophysical property (as a number) down a borehole.

MEGS_Log allows you to graphically display a geophysical trace that has been saved in one of the Log Ascii Standard (LAS) formats. Each LAS file can contain one or more traces for a single borehole.

You can choose to display each trace in one of the three trace fields that scroll with the right borehole. You can set the minimum and maximum range horizontal display range for the trace, shift the display of the trace vertically and change the colour used to display the trace. MEGS_Log can also calculate the average value of the trace over a vertical range of the borehole.

Settings associated with each trace, such as the field, colour and range, are initially retrieved from the config file when the trace is first loaded.

MEGS_Log only lets you display traces, you cannot edit the original trace in any way.