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Author Topic: Setting Z in local coordinate system  (Read 3211 times)

BrianZimmer

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Setting Z in local coordinate system
« on: September 29, 2017, 08:16:41 PM »
Hi Folks,
I am creating DEM's of footprints pressed into volcanic ash. My question is...
Can I artificially set the z value of my model in the local coordinate system?

Essentially, I have several prints I am trying to show comparisons between and my current DEMs have arbitrary min and max values when I draw on contours.

I have already used the bounding box alignment script to get the print properly oriented, but I'd like all my DEM contours to show comparable values (say 0-2cm) instead of one print showing z values of 15-17cm and another -6to-8cm.

My thought was to place a marker at the low point and set the z value to 0, but to create a DEM, you need three points. All prints are scaled.

Thanks for the assist. I love this software!

Brian

SAV

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Re: Setting Z in local coordinate system
« Reply #1 on: October 02, 2017, 09:48:16 AM »
Hi BrianZimmer,

You might want to use CloudCompare (free, open source) for more advanced analysis/data manipulation.

Have a look at the CloudCompare WIKI to see the full functionality:
http://www.cloudcompare.org/doc/wiki/index.php?title=Main_Page

These functions might be particularly useful for you:
ALIGN: http://www.cloudcompare.org/doc/wiki/index.php?title=Alignment_and_Registration
LEVEL: http://www.cloudcompare.org/doc/wiki/index.php?title=Level
APPLY TRANSFORMATION: http://www.cloudcompare.org/doc/wiki/index.php?title=Apply_Transformation
RASTERIZE: http://www.cloudcompare.org/doc/wiki/index.php?title=Rasterize

Regards,
SAV

« Last Edit: October 03, 2017, 04:33:08 AM by SAV »

BrianZimmer

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Re: Setting Z in local coordinate system
« Reply #2 on: October 02, 2017, 03:57:11 PM »
Hi SAV,
I've been using CloudCompare for... well... comparing the clouds but I didn't realize it had this extensive functionality. It will do exactly what I need it to. Thanks for the response and links!

Brian


SAV

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Re: Setting Z in local coordinate system
« Reply #3 on: October 03, 2017, 04:36:26 AM »
Hi Brian,

CloudCompare is a really great piece of software. I am using it a lot too.

Please consider to make a small donation to keep the CloudCompare project going. Here is more info:
http://www.agisoft.com/forum/index.php?topic=7317.msg35187#msg35187

Note that I am not associated with CloudCompare. I just think that it is important to support great projects/people.

Regards,
SAV

BrianZimmer

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Re: Setting Z in local coordinate system
« Reply #4 on: October 06, 2017, 03:05:05 PM »
Done. Thanks for the reminder.

SAV

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Re: Setting Z in local coordinate system
« Reply #5 on: October 06, 2017, 04:09:10 PM »
 ;D