OBJ global positioning not correct

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aokeefe289
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Joined: Mon Oct 21, 2024 4:19 pm

OBJ global positioning not correct

Post by aokeefe289 »

Hi,

I know I HAVE to be doing something wrong, so I thought it best to post what I'm doing and what I'm trying to achieve - all help greatly appreciated!

I have a LAS file (in CRS EPSG:27700), which when I import to CC I get the global shift/scale window which states
shift of --627000.00, -231000.00, 0.00 and scale of 1. (The preserve global shift on save is ticked)

Thats fine, I import it in, compute normals, apply PossionRecon to mesh it and then export as an OBJ

However, when I load my OBJ into Cesium, its positioned at 49.79650021969205 , -7.565011240063517 (Lat/Long), but I expected it to be 51.937229 , 1.3132739.

I assumed on export that it would've kept the original coordinates? What am I doing wrong that it's being misplaced?
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daniel
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Re: OBJ global positioning not correct

Post by daniel »

Which version of CC are you using?

Also, normally the OBJ exporter can handle large coordinates (up to 12 digits). Are you able to share the data with me? (if it's too large, maybe just 2 small slices of both the LAS file and the generated mesh inside a BIN file). If yes, you can send this to admin@cloudcompare.org
Daniel, CloudCompare admin
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