Trimble Business Center

I am trying to select a group of points by elevation in advance select. I have the point group selected > current selection > sort by Elevation > equals > ? undefinded. It will not select the points undefined. I have also tried using the select by elevation. I created the points from cad text which in turn created two sets of points. One set I gave an undefined elevation to in the pre/suff dialog for vertical offset. The second is actual elevation. The thought was I would use the undefined to sort and delete. Now I am sure that if I go and give it a 30,000 vert offset and change the selections to reflect, all will be wonderful. However, what if I actually want to see all undefined points in the project? Not zero el but undefined. How do I go about making that selection?

As an aside, I love that we have some layer prefixing on the import as it can really help to keep multi imports clean. It would be awesome if we could also get access to the group option as well. I have an OG import, it may as well go under my OG group. it could save a lot of "click-button smash, click-button smash.."

I did a quick search and didn't see anything relevant. I apologize if this has already been covered...

#helpimdeletingpointsoneatatime

I guess I solved my own problem. it seems a little counter intuitive but what ever...Select point group > current selection>elevation>greater than> 0 >Inverse selection checked

Got it.

To display areas of a project that have undefined elevations, you can use the Display Options at the base of the View Filter Manager and set the value to "Display in an alternate color and set the color to eg Magenta - then all the undefined CAD points are displayed in Magenta color.

The challenge with Undefined is that it has no value - so it is not zero or less than or greater than a value and we don't have a select by Elevation Undefined option - so you then have to do as you did - select by an elevation range eg between 0 and 1000000 or greater than eg 0.1 to select all the data with elevation and then Invert as you did. You can do that in advanced select or select by elevation.

This is the best way to do this today

Alan

the view option is not lost on me, it does not select undefined however. My malfunction was setting the initial elevation to undefined as apposed to adding 10000 or something...

Just to add another form.

command > Select Point : this lets you select by layer which is pretty handy. > Elevation Quality -unknownand then click ok. > then click inverse.

works well if you only have points on a single layer.  

Thanks Francisco! there are never enough ways to skin any one cat!