Trimble Connect Knowledge Center

Point Clouds 

01-05-2017 17:48

Point Clouds

A point cloud is a set of data points in some coordinate system. In a three-dimensional coordinate system, these points are usually defined by X, Y, and Z coordinates, and often are intended to represent the external surface of an object.

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12-04-2020 02:22

Hello @Marko Myllymaa, how to display Point Clouds in TC WEB? Is it possible some free way? :) Martin​

06-12-2017 12:31

How can I convert a RCP, TZF or E57 to Potree format to use it in Trimble Connect?

05-31-2017 23:42

Is it possible to move and rotate the point cloud (not the model) manually, after importing into TC?

 

...in a workflow like this:

Scan at site -> Import to Autodesk ReCap -> Processing scan -> Export to LAS / XYZ -> Import to Potree -> Import to TC -> Manually move / rotate into position

 

Reason is that we do not want to use global position because model is not on correct position (and don't want to spend time on correct positioning), and expect model and scan to be placed at different location, and no need for 100% accurate placement.

 

Regards Bjørnar

04-28-2017 00:45

Hello,

As I am familiar with pointcloud data process I think if Trimble now handles LAS/LAZ format the best way to overpass that global coordinate issue is to read in LAS/LAZ file internal metadata dedicated to COORDINATE REFERENCE SYSTEM (CRS), namely :
A “WKT” bit that has been added to the Global Encoding flag in the Public Header Block. If this bit is set, the CRS for the file will be located in the WKT (Extended) Variable Length Records (EVLR, VLR).

 

Please note that EPSG database is a good source for managing all CRS beeing used up to now.
For more info see

http://www.asprs.org/wp-content/uploads/2010/12/LAS_1_4_r13.pdf 

Regards,
antoine billault

02-08-2017 00:40

Hi Gregory,

 

Yes, it's possible. Problem is that point clouds are usually in world coordinates, i.e. in real coordinates. This means that they might be like 25000 km from the origo.

Models are usually created using their local coordinates, i.e. origo is somewhere close. This means that you cannot see them in these positions.

Now you need to move the model to same location as the point cloud is. Make sure the model is visible: Select the model in model list and then hit space bar.

Click the i-icon on the model in model list, then you should see "Move" tool. Click that, and pick one point from the model in 3D.

Now for the target point you need to switch to point clouds list, select the wanted point cloud and hit space bar. (Space will zoom to selected objects.)

And then select second point from the point cloud.

 

After this initial move you can then continue fine tuning the location.

 

Hopefully this helps.

 

Best regards,

  Marko Myllymaa

02-07-2017 10:57

Very interesting feature!

Is it possible to have both point cloud and model displayed together? 

It seems I can have a point cloud or a model.

 

Best regards,

Gregory

01-27-2017 00:55

We are working on getting the point cloud importing done. While that's not yet out, you can use PotreeConverter, that you can download from here:

PotreeConverter with support for LAS, PLY and XYZ files | Potree 

 

Best regards,

  Marko Myllymaa

01-24-2017 04:23

Be sure to set your graphic settings to DirectX. My settings were set to OpenGL but I didn't see the pointclouds.

Patrick Schemkes

VolkerWessels BVGO

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