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Remember that not all SEG-Y files contain navigation. |
Example of To continue importing SEG-Y 2D navigation
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follow the guide about: Importing SEG-Y
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Shot points often appear in pairs, i.e. they change every other trace. |
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The SEG-Y format states that a negative Scaler denotes division, e.g. Scaler = -10 means divide X and Y with 10. The drop down for fixing the multiplication factor, on the other hand, uses pure multiplication, e.g. Scaler = 0.1 means multiply X and Y with 0.1. |
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The scaler may be 0 on file. This will lead to X and Y being 0 in the dataset. Fixing the Scaler to 1 is usually the correct setting in this case. |
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Click the Defaults button to get back to the default settings. |
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. Read the Scan file section thoroughly.
Importing UKOOA navigation
Navigation is often stored in UKOOA/P190 format as ascii files.
Select either UKOOA Lat Lon or UKOOA xy, depending on you files coordinate format. The only difference between these two is that UKOOA xy will have less columns for the coordinate input.
The ASCII import will load with default values, ready to read the UKOOA format. After browsing in the UKOOA file observe that the file columns are interpreted correctly.
Example of UKOOA Lat Lon import
If necessary, make the required adjustments to the column position settings, using the controls marked in the image above.
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Note that Scalar = Shot point |