Surface problems: Adjusting points and TIN lines

[seanbickell]

Hi all,

We're having some strange issues when importing points generated from Virtual Surveyor (LiDAR) to create surfaces with. These are "low pass" or bare earth points imported with standard PNEZD format to create our topo's. However, we've run into a couple of wonky problems.

We'll set the Low-Pass points as their own point group, then add that as the initial definition for the surface. As the field crews bring in more data later, we try adding that to the definition as its own point group as well, but often they don't seem to register on the surface. They often won't function with the TIN properly. We end up with some kind of error (yellow exclamation mark) next to the point groups under the definition tab on import, but I'm not sure how to view what the actual error is. 

Another anomaly we've encountered on importing the low-pass points is that while all come in as regular COGO points, some have crosshairs on them. Most don't, but we've been trying to figure out why this happens and what (if anything) it signifies, as we didn't change any styles on any of them. Any help or advice would be greatly appreciated!

[Pointdump · Accepted solution]

Hi Sean,
Questions. LiDAR data is usually pretty dense. If the data is LAS or LAZ files you'll want to use ReCap to import into Civil 3D. Or use Terry's nice >>>LidarTools<<<.
The yellow exclamation is just alerting you that you need to update your point group.
"...while all come in as regular COGO points, some have crosshairs on them."
Gonna need to see a screen shot on that one. If you've got 2 point groups, you might have 2 different point styles.
Can you post your drawing and data?
Dave

[seanbickell · Accepted solution]

Thanks for the reply, I'll get back to you with that ASAP. 

[seanbickell]

Hi again Mr. Stoll,

Sorry for the late reply. Your advice regarding managing the point groups solved most of the issues. Thanks so much for the help!