Pointools puts out POD in wrong coordinate system

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Dedken
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Pointools puts out POD in wrong coordinate system

Post by Dedken »

I've processed a scan in SCENE and transformed it into OS coordinates. When I export the scan points as a POD and open in Pointools they are in OS coordinates. If I then export the pointcloud from Pointools and use the plugin to bring it into ACAD it puts it in the wrong place in. This also happens if I use the plugin to import the POD directly exported from SCENE.

All previous scans I have processed have been in local coords and I have never had this problem, but I can't see how it would be anything to do with transforming the coordinates because it was done in a different program and then exported.
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Re: Pointools puts out POD in wrong coordinate system

Post by AG_MJA »

AutoCAD plugin can't handle the large tranformation coord of OS grid. It truncates the coords and gives you the 3D offset on the thrid tab (i think) of the pointools toolbox. Easy to offset the origin of cad to correct.
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Re: Pointools puts out POD in wrong coordinate system

Post by Dedken »

Ah, OK that makes sense. Not very helpful from Pointools though.
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Re: Pointools puts out POD in wrong coordinate system

Post by DanCutler »

You're almost correct. Historically it is AutoCAD that cannot handle large coordinates (more than 9 digits either side of the DP if memory serves), hence why the Offset tool was included. However, I imagine Autodesk would have had to overcome this issue in AutoCAD 2014 becuase of it's new built-in point cloud capability..

If you want to see your POD on the correct coordinates you can force it to do so by typing the command:

PTORIGIN

and then entering: 0,0,0

The recommended workflow is to draw in the offset position and then use the offset values to move the drawing to it's correct position at the end.
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Re: Pointools puts out POD in wrong coordinate system

Post by Matt Young »

I have not been using Pointools but have generally got into the habit of always removing the first 3 digits when using OS data. Can always transform it later :D
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