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| Didgitze and export a broken curve from Didger in LAS format? |
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Didger cannot break the planar space in the plot in the way that you can break a line in a graph. Nor does it (yet) export null values. Instead you can digitize the image of the curve line in two sections, and modify a pair of exported LAS files in a text editor.
Ex.
Imagine you have a curve that starts at depth 650 and goes to 700. The curve starts again at 800 and goes to 900. Your scanned (or paper) log does not represent this break as space, but as a horizontal line. You want to represent null values as -9999.
In this case you would:
- First import and calibrate the top half of the image.
- Then import and calibrate the lower half.
- Arrange the image order so the first is showing and digitize that top section of the curve.
- Re-arrange the images so the second image is showing and digitize the lower half of the curve.
- Export as an LAS. Use the depth 650 - 900. Choose an interval.
- Delete the top curve.
- Export as an LAS. Use the depth 800 - 900. Use the same interval.
- Open this second curve in a text editor. Copy the lines from 800 - 900
- Open the first curve in a text editor. Select all lines starting
at 800 and paste the copied section over them.
- Replace all values in the third column between 700-800 with -9999 (as described above)
- Save the this first file.
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