Draw Everything in the Same Plane Autocad

1. 2011-11-02,09:36 PM #1

   

   Woo! Hoo! my 1st post

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   How to flatten everything onto the same plane, projected from a certain UCS?

   Okay, so I aligned a flat site drawing to a topographic survey (x, y, and z axes) and did not think of how it would change the plane of the elements (polylines, mleaders, etc). I defined my UCS by object to one of those polylines and continued to work from there. Now when I change my UCS to world, things are skewed and not lining up correctly to my xrefs.

   Here is a screenshot of a portion of the site where the site is how I want it to look. Notice how the XYZ arrows on the bottom left are a little off:

   

   Here is the same spot in world UCS:

   

   And here is a view from the left:
   

   So my question is, how do I project all the polylines, text, etc at the UCS view that I've been working in (the one that's a little wonky) onto world UCS? In other words, the drawing is how I want it in the wonky UCS, but I need it to look like that in world UCS. I've tried the flatten command, but everything still looked tilted when viewing it from the left.Any help would be greatly appreciated!! Thanks!

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2. 2011-11-03,11:23 AM #2

   

   Member

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   Re: How to flatten everything onto the same plane, projected from a certain UCS?

   Shot in the dark this one because its difficult to see exactly what has occurred without the dwg but....It looks as though the two top images (one wonky and one as you prefer) are both showing the same UCS icon and that the "Viewpoint" is changed. Possibly you are confusing USC with Viewpoints? Running the Flatten command will only drop the objects onto the WCS so you may have to be a bit "Tricksy" with this one!
   1. Try having the view as you prefer (whilst looking at the drawing from PSpace in a ModelSpace Viewport) then set the UCS to "View".
   2.Select All the obects and CHSPACE. This will drag everything into Paperspace.
   3.With the WCS now active "Flatten all the Objects that are now in Paperspace.
   Click into Modelspace then UCS "World" and change the view to "TOP" (important)
   4. Back in PSpace...Select all the Objects and CHSPACE again.
   5. Select all the objects and "Flatten" once more.

   I think this may help but it might be a little innacurate and may be useful to set a scale with a factor of 10 before using the CHSPACE command? "Flatten" can produce some strange results... Good Luck....because the manual way of correcting this via QSELECT and changing Z Coordinates is "A Pain ITA!"

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3. 2011-11-03,11:49 AM #3

   Re: How to flatten everything onto the same plane, projected from a certain UCS?

   I'm not sure flatten is the route you want to go, but I will provide this warning, watch the use of the flatten command with blocks, it will rename them, which makes it very difficult to update them if necessary in the future.

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4. 2011-11-03,12:34 PM #4

   

   Member

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   Re: How to flatten everything onto the same plane, projected from a certain UCS?

   Originally Posted by ccowgill

   I'm not sure flatten is the route you want to go, but I will provide this warning, watch the use of the flatten command with blocks, it will rename them, which makes it very difficult to update them if necessary in the future.

   Wise words...I would agree with this and would normally say "get the drawing correct from the start" rather than tackling this problem later if possible? I would not normally remove 3D information from any drawings and would prefer to "Replace Z Value with Current Elevation" when adding 2D information etc and using SNAP in a 3D drawing...It was really just a possible "quick solution" but certainly not the preferred/correct option in my view...Unfortunately I couldnt see any other quick work around but I wouldn't want Chente to continue along this path in the future...Fire Prevention is ALWAYS better than Fire Fighting in my book

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5. 2011-11-03,10:23 PM #5

   Re: How to flatten everything onto the same plane, projected from a certain UCS?

   Originally Posted by chente715492

   So my question is, how do I project all the polylines, text, etc at the UCS view that I've been working in (the one that's a little wonky) onto world UCS? In other words, the drawing is how I want it in the wonky UCS, but I need it to look like that in world UCS.

   One posibility is - freeze all xref layers then make a block of all the drawing objects (ctl+c will do), change to WCS and insert (or ctl+V) the blocked objects. Erase old objects and explode new to suit.

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necaisegoeve1984.blogspot.com

Source: https://forums.augi.com/showthread.php?134404-How-to-flatten-everything-onto-the-same-plane-projected-from-a-certain-UCS

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