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Method 2 - Optimizing CAD File Prior to SketchUp
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Bind / NCOPY from XREF

3.6_Bind-NCOPY from XREF

0:02 Let’s now take a moment to review how to get information from an XREF into our current plan.

0:11 Why might we want to do this?

0:13 First of all, most professional CAD plans are likely to contain at least one if not more X-references (XREF).

0:19 They could be site surveys from an engineer, consultant files, multiple floor levels, etc.

0:27 We could choose to import each XREF separately into SketchUp, but it’s likely that we don’t need all the information contained within them..

0:35 and don’t want to spend a bunch of time – like we’ve already covered – cleaning up a reference file in addition to our main floorplan drawing.

0:44 So let’s look at two quick ways to get just the CAD information we want, or need, from an XREF into our current drawing.

0:52 The first way is to 'BIND' the XREF.

0:59 Binding brings the entire reference file into our current drawing and inserts it into place as a block.

1:08 We can then explode it...

1:12 or copy just the linework we want and freeze or delete the rest.

1:19 Obviously if you chose this method it may make sense to do first prior to purging and consolidating layers like w've already reviewed.

1:30 Of course if the XREF (in our case the site context) is likely to change, we may want to keep the XREF live so that if you or someone else edits it, we can reload it and see the changes.

1:44 Which is why I want to review another method that’s a bit less destructive than binding everything – which is the 'NCOPY' or nested copy command.

1:54 I’ll go ahead and undo that last BIND so we’re back to our original XREF.

2:01 Then typing in 'NCOPY', CAD asks to select the nested objects that I want to copy.

2:11 For now, let’s only 'NCOPY' the site boundary which is the same as the ground boundary for our first floor.

2:19 If it’s hard to see the line I’m referring to, try turning off the ‘A-WALL-EXT’ layer first…

2:27 then use 'NCOPY' to select the building boundary line.

2:33 And enter three times to make it live in our drawing the same location.

2:40 And that’s it.

2:44 Another reason 'NCOPY' is a nice trick to know is that it’s likely that the drawing origin and orientation differ from our XREF and floorplan.

2:54 If I imported them both separately into SketchUp, then I’d likely have to move and rotate (the XREF) introducing a potential for error.

3:05 And if the drawing changed and I had to re-import either CAD file, then I’d again, have to re-move and rotate everything once again.