From Jan 2014 Geoplot 3 includes a free upgrade to Geoplot 4.0 when available

Geoplot Processing - Page 1

Processing includes a comprehensive range of functions for manipulation of all data types, together with specific routines to correct for data collection artefacts such as edge matching and drift correction. Some functions are designed specifically for Geoscan Research instrumentation but all may be equally applied to other instrumentation data sets. Mathematically, any real bipolar or monopolar two dimensional data array may be processed.

A processing tutorial is included in the instruction manual, together with "QuickStart" cards which guide you through the processing sequence appropriate for each data type. Both assist new users in becoming an adept and competent processor with a minimum of effort, and help to prevent inappropriate processing of the data.

Processing functions can be applied to the complete data set or any specific rectangular area, known as a block. You can specify a block either by entering co-ordinates in a form or, by selecting the area using the mouse. This block remains operational until turned off. You can select process functions and process area from the menu, or more conveniently from the process toolbar.

Processing history is stored with each data file. This records function applied, the chosen parameters and co-ordinates of any selected block, giving full traceability. A floating form, "Latest History" shows the last four processes applied and you can instantly switch to the history view to see a full listing of all processes. The process history shows a dotted dividing line between those processes that have been saved and any new functions that have been applied but not saved. History comments can be added, inserted or deleted when the history view is shown.

Numeric Functions

Add, Multiply, Absolute, Power, Clip, Compress, Search and Replace, Randomise are general purpose numeric tools with a variety of applications. Some examples follow though they are by no means limited to these. The Add function can be used to edit a single data point or bias a block of data. Multiply can be used to normalise data or convert resistance to resistivity. Absolute can be useful in the generation of magnetic-resistance correlation plots. Power can be used to convert resistivity to conductivity. Clip can be used to limit data to specified maximum and minimum values for improving graphical presentation and also forms a useful pre-process procedure for many other functions. Compress can be used to fit data within the dynamic range of a display device or printer, allowing both large and small magnitude features to be visible at the same time. Search and Replace can be used, in conjunction with Clip, to convert regions strongly perturbed by nearby iron fences, pipelines etc. into dummy regions, allowing other statistical functions to perform correctly. Randomise may be used for introducing a controlled amount of noise so that surveys performed at different times or with different instruments visually match.

Cut and Combine

This function provides Cut and Paste, Add, Subtract and Multiply operations between two data sets (grid and composite). This can be applied between any block of source data and positioned at any location in the other data set. Applications include merging data sets, splitting data sets, generation of correlation plots between data sets etc. Another powerful application is to examine the effect of a process function (by subtracting the original data set), thereby ensuring that the process function has been applied with the correct parameters.

PROCESS FUNCTIONS CONTINUED ON NEXT PAGE ………….

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