Error importing PTX and LAS files

[ernestomdo]

I am trying to import PTX or LAS files into Civil 3D and keep getting coordinate errors. Meaning, the scan data comes in at the right size (I've verified dimensions in RealityLINx) but for some reason the scans keep coming in close to the 0,0,0 point. I have tried two seperate projects, one with arbituary coords (7000, 7000, 600) and another with state plane coords (NAD27, Zone 5).

I have tried two ways... Through the Prospector using the CREATEPOINTCLOUD command. The scan data is in metric units and I have not found a way to convert the scan data, in Civil 3D, to feet units.

The other way I have tried is throught the POINTCLOUDINDEX command. This command will convert my PTX or LAS files into a PCG and upon insertion into the drawing, I am able to give it a scale factor to try and convert to feet.

Like I said, I have done this all day today, with seperate projects and keep getting the same results. I have inserted the scan data in both metric and feet units, measured identical objects and have come up with the same dimensions between the both units. But I still cannot get them to land where they need to.

I am unsure if this is a coordinate system error but most of the stuff that we scan is in an arbituary system, so I am not sure if assigning a coordinate system will do the trick.

Any help and or guidance with this matter is greatly appreciated.

[AlmasSuljevic]

Can you post the error meesage you are seeing? Do you have coordinate system set in Create Point Cloud dialog (Source Data step). Is it the same coordinate system for both drawing and point cloud?

sistem

imenica: sistem

[ernestomdo]

Thanks for your response. I am not getting an error in particular, the point clouds are just not coming into the coordinates that they should be per the PTX and LAS files. I have not set a coordinate system because these are located in an arbituary coordinate system and not on some known state plane coordinate system. I was wondering if that is what is causing my issues. If so, how do I import point cloud data in the coordinates that we located them at and are not tied to a known coordinate system?