Viewing GMF Files

Viewing GMF Files

GMF files are different than most other C Tech file formats in that the data is specifically NOT associated with borings. GMF files can be viewed using post_samples, but file_statistics can often be more useful, especially when dealing with large datasets.

Let's build a new application:

file_statistics (and post_samples) will only display a single surface of a GMF file at one time. The advantage of file_statistics is that it will provide the extents and basic statistics information. The Data Component parameter determines which surface is displayed. 0 (zero) is the first surface.

file_statistics outputs points which are colored by elevation (for GMF files).

Double click on file_statistics and select the file Reference\bathymetry-with-fault.gmf.

The viewer should show:

The first problem I have with this application is the confusion that axes' colored grid creates when viewed with the cloud of points. Let's modify axes' parameters to create very simple axes.

Double click on axes and modify all parameters which have been highlighted.

Now we have: 

In this view, each point is displayed as a single pixel point. You can increase the size to be a square of 2x2 pixels or larger using the Point Width parameter. Alternatively you can display Points As Spheres and make them any size (this is the computed default of 12.6).

When file_statistics runs, it provides the following information to the Information window.

Note that Number of Bins was set to 10, and Detailed Statistics was turned on.

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