Does anyone have a trick to delete shared surface polys? Got a data set that has 3 copies on top of each other :roll: (making for a total of nearly 300+K polys). Unfortunately, the polys are in random order so I can't use the delete SOP with range option.

Any suggestions are appreciated.

Rob

Try appending a Connectivity SOP (H7.0+) and then delete all points/primitives which have their attribute “class” a non-zero value.

edward
Try appending a Connectivity SOP (H7.0+) and then delete all points/primitives which have their attribute “class” a non-zero value.

Thanks Edward but this doesn't work. My test case is creating 3 identical box SOPs & merging them into one SOP. Now, I want to eliminate those polys that rest exactly on top of other polys. Basically take the 18 polys and end up with 6.

Cheers,
Rob

That's what I did. Works fine for me. H7.0.231. Here's the expression I used in the Delete SOP after the Connectivity:
point(opinputpath(“.”,0),$PT,“class”,0)!=0

edward
That's what I did. Works fine for me. H7.0.231. Here's the expression I used in the Delete SOP after the Connectivity:
point(opinputpath(“.”,0),$PT,“class”,0)!=0

Thanks Edward. This works … with the box example. However, when I apply to my large data set I only get one small bit. I'll play with it for a bit. Thanks again.

Cheers,
Rob

No problem. That suggests that your geometry is in more than just 3 pieces. You can just look in the geometry spreadsheet or create groups out of the values of “class” (Partition SOP).