topic Re: CHANGESPACE elevation issue in Civil 3D Forum

CHANGESPACE elevation issue

Anonymous — Thu, 15 Jun 2017 23:43:46 GMT

I am editing a drawing in which when I use CHANGESPACE on a simple object (such as a line) from paper to model space, the object for some reason assumes a Z value (elevation) of something other than 0. How can I correct this?

Thank you for any insight!

Jenn.

Re: CHANGESPACE elevation issue

MMcCall402 — Thu, 15 Jun 2017 23:53:13 GMT

Hmmm, weird, and it will vary based on the viewport scale.

Re: CHANGESPACE elevation issue

AllenJessup — Fri, 16 Jun 2017 13:01:17 GMT

It doesn't happen to me in 2017 and can't ever remember it happening. What do you have ELEVATION set to?

Re: CHANGESPACE elevation issue

Ranjit_Singh — Fri, 16 Jun 2017 17:22:36 GMT

Make sure modelspace is set to world UCS before calling chspace.

Re: CHANGESPACE elevation issue

Anonymous — Mon, 19 Jun 2017 14:49:14 GMT

The viewport scales are set to 1"=20' or 1"=10', very standard. I've never had this issue in other drawings with the same scales applied. Yes, weird... 😕

Re: CHANGESPACE elevation issue

tcorey — Mon, 19 Jun 2017 21:42:14 GMT

I don't think you answered what @AllenJessup asked. Type Elevation and note the default. This will place objects at elevation, even if you don't mean to. Set it to 0.

Re: CHANGESPACE elevation issue

Anonymous — Mon, 19 Jun 2017 23:41:57 GMT

Yes, I had already typed ELEVATION and checked the default. It was correctly set to 0.0000...

Thanks, tho 🙂

Re: CHANGESPACE elevation issue

Anonymous — Mon, 19 Jun 2017 23:45:06 GMT

ELEVATION is set to 0.0000...

Re: CHANGESPACE elevation issue

AllenJessup — Tue, 20 Jun 2017 12:03:07 GMT

I still can't duplicate it in 2017. What version are you using? Can you post the drawing even if you have to erase most of the entities?

What is BACKZ set to?

ELEVATION is stored separately for ModelSpace and PaperSpace. So check both,.

Re: CHANGESPACE elevation issue

dkinnearBUV5J — Tue, 20 Jun 2017 12:37:22 GMT

I have had this issue as well, in my company's template file. If I open something from an Autodesk one, it's fine. I have never been able to figure it out. Hopefully someone can find a solution. I've attached a blank file from our template if anyone wants to investigate further.

Edited to add, this was a problem in 2016 as well as 2018. Viewport scale doesn't make any difference. I have noticed in some files that the elevation changes, but I think those are from an Architectural template.

Re: CHANGESPACE elevation issue

Anonymous — Thu, 22 Jun 2017 22:24:47 GMT

Hello -

I have attached a stripped down drawing that will illustrate what is happening. Basically, drawing a polyline at 0 elevation in paperspace and moving it to model via CHANGESPACE will result in a polyline whose elevation is supposedly still 0.00. However, when exploded, the resulting lines are at a negative Z value. If I change LINES to model space, they have a negative Z value immediately.

The UCS in the viewport is not World (the results seem normal otherwise), however I have been using the CHANGESPACE command the same way with different UCS settings for virtually all of our drawings with never an issue. There must be a setting somewhere I am missing or unaware of??

Oh, I am using Civil 3D 2018.

Thanks, all

Re: CHANGESPACE elevation issue

Mike_Hurtado — Mon, 26 Jun 2017 17:26:03 GMT

Going to poke my head in here and thank everyone for their efforts!

I grabbed the files and reproduced the issue on my end (in 2018) so I logged it with the development team.

Re: CHANGESPACE elevation issue

bham4ever — Fri, 11 Jan 2019 20:55:15 GMT

I think this is a bug in AutoCAD if your Model space is 1:1 but your Paper space is at a scale like 1:20 then when you do Changespace the line work drops in at some wild elevations not "0" if they are both the same 1:1 then it doesn't change the elevation. I run into this all the time. I just have to remember to change those items to "0" after.

Re: CHANGESPACE elevation issue

dkinnearBUV5J — Fri, 11 Jan 2019 21:08:10 GMT

Thanks for your response, but I don't think that is what is happening on my end. Paperspace is always at 1:1 or equivalent scale that means one to one, though it never lets me set the paperspace scale anyway. I've tried changing it in my page setup because sometimes it picks up one of those weird ones like 1" = 1"_2. I'm not even sure where they come from, but in any case, it always reverts back to said oddly named scale. If I open up a brand new drawing from acad.dwt, it doesn't happen. If I open up a new drawing from our company's template file, which to my knowledge has not been recreated, but rather saved forward over and over with each new version of C3D, it does happen. It's almost always the same elevation (661.8386), too, regardless of the viewport scale. I try to remember to fix it as you say, but I just hate having the mystery go unsolved. Thanks again for your input.

Re: CHANGESPACE elevation issue

AllenJessup — Fri, 11 Jan 2019 21:53:14 GMT

@dkinnearBUV5J wrote:

If I open up a brand new drawing from acad.dwt, it doesn't happen. If I open up a new drawing from our company's template file, which to my knowledge has not been recreated, but rather saved forward over and over with each new version of C3D, it does happen.

That can cause major issues. I learned to start with a new OOTB Template for the current version. Then Import the Styles and settings from the previous template.

The odd scales are usually absorbed from Xrefs. Try resetting your scale list. They won't go if they're in a Field.

I believe @bham4ever was referring to the layout scale. Not the actual paperspace scale of 1 Unit = 1 inch.

Re: CHANGESPACE elevation issue

zalant — Wed, 23 Oct 2024 22:23:08 GMT

Very late the party here gang, but thought I'd chime in.

Objects that you send from paper space to model space (using CHSPACE) will adopt the Z value of the viewport's TARGET (read-only) variable. If you want the object(s) to end up with a zero elevation, you must first change the viewport's TARGET to 0,0,0 (using the DVIEW command). This article isn't necessarily about the issue in this thread, but the Solution section does cover how to reset TARGET to 0,0,0. You must begin inside the model space of the viewport to change its TARGET. (Every viewport and the Model tab maintain their own separate TARGET value.) Of course, that will change what's currently shown inside the viewport, but you can reset that via panning & zooming.

Re: CHANGESPACE elevation issue

dkinnearBUV5J — Thu, 24 Oct 2024 12:00:54 GMT

Thank you, that does indeed fix the problem. I actually have created my own template so I don't have to deal with this problem, but it's good to know what controls that Z value. It's amazing how many system variables there are that I just know nothing about. Have a great day!