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Change Object or line back UCS to WCS

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zyborgmonkey View Drop Down

Joined: 12.May.2017
Location: United Kingdom
Using: Autocad
Status: Offline
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zyborgmonkey Quote  Post ReplyReply Direct Link To This Post Topic: Change Object or line back UCS to WCS
    Posted: 28.Dec.2017 at 12:11
So I've been working on some drawings where I've needed to align the ucs to the subject to draw on the correct plane.
I don't tend to use the dynamic ucs because as all the lines are real life surveyed .. nothing is perfectly straight or on the same plane so this tends to give bad results and is just a pain.

The issue I now face is that going back to WCS I find that a lot of objects have different z values tied to various UCS rather than WCS. IE if you change the z value manually in properties or use FLATTEN in some cases the line will shoot off in the XY WCS direction.

I think the problem is caused by using polylines within the UCS as they are flat lines that only run along one elevation/Z and whatever blah blah programming,database etc etc it just doesn't work. So using things like FLATTEN can destroy your drawings (as I've been reminded of recently before saving a good backup -_-) I'm guessing this may be one of the reasons .

aaanyway I struggled to find an answer or the topic so thought I'd post this in case anyone else needs help 

BURST your blocks (to keep any ATTDEF info) and EXPLODE all of your 2d polylines  before using the FLATTEN command or touching the Z values.

and only ever use flatten on drawings you know were drawn completely in WCS or that don't contain 2dpolys.

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adam007 View Drop Down

Joined: 29.Dec.2017
Location: United States
Using: AutoCAD2013
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adam007 Quote  Post ReplyReply Direct Link To This Post Posted: 29.Dec.2017 at 17:38
Thank you for that, I was searching for this answer too.
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John Connor View Drop Down
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Joined: 01.Feb.2011
Location: United States
Using: AutoCAD 2018
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Connor Quote  Post ReplyReply Direct Link To This Post Posted: 29.Dec.2017 at 17:41
I kind of doubt that.  Seems rather suspicious.
"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

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