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ChrisM

stereonets

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We recently installed updates to RockWorks6. Stereonets based on contour intervals of pole to plane data that I generated before the update have suddenly changed. It's not quite like they rotated, but they're very different. The initial ones were generated using the basic defaults - was there something in there that changed? I have one stereonet comprising two great circles that remained the same.

Thanks.

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Hi Chris,

when you install a new version RockWorks will overwrite your old menu settings and reset them to the original default values. You should check all your Sterenet settings to see if they've changed.

Mitch

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That's the problem. I'm having trouble figuring out what defaults might have changed that would result in an almost (but not exactly) 90 degree rotation. I've played around with changing things like the gridding option or density, but that doesn't change the basic orientation of the resulting data set. The projection type is the same (Schmidt vs. Wolff) and data convention are the same. Although if I change the data convention from right-hand rule to dip direction, it does rotate the resulting data set, but not the same way as originally calculated. I can pull up a file of the previous result, but it's a ReportWorks file - is there a way to back into the settings used to calculate it? If not, can you give me some ideas on settings I can try changing?

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Chris:

When you create a stereonet, you have the option to choose input as strike and dip, or dip and dip direction. It sounds like you may have the wrong one selected since the strike is 90 degrees from the dip direction.

If you continue to have problems, you are welcome to send me your ATD file. I'd be happy to take a look.

Regards,

Alison

[email protected]

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