AutoCAD Civil 3D :: Scaling Points Without Changing Elevations
Oct 28, 2009
Any way to scale points, and or objects in a 2 dimensional manner only? I've got a bunch of survey points imported from a csv file, and they are at a grid scale. I need to scale the data by a factor of 1.000125 in this case to get ground distances between the points for the client. I do not want the elevations to change.
In LDDT this was not an issue as I always had the points inserted at zero elevation, but they maintained the elevation data as part of the point. It seams that in Civil 3D my points automatically appear at true elevation, so when I scale a group of points, the elevations changes as well as the elevation of any lines connected to the points. Is there a way to work 2 dimensionally with 3D data?
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Sep 13, 2013
Given a feature line/polyline(FL/PL) and a series of points directly on the FL/PL, how can you assign the elevations of the points to the vertices of the FL/PL?
Without using a surface?
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May 9, 2012
I know there are different ways to do this. Would like to know multiple options so I can see which might be quickest for me.
I have points with elevations and 2D plines at elevation zero drawn between them.
I would like 3D plines instead. This is the easiest way for me to transfer them to another drawing where I will make surfaces with them. I don't want to have to transfer the points over.
I can redraw the plines as 3D plines but this is time consuming and seems unecessary.
I don't want to have to convert them to Feature Lines either. I prefer they be 3D polylines.
Is there a simple command for this? I already have a surface containing the points and lines as surface breaklines.
Is there a project objects to surface command that will make these 2D plines at elev 0 into 3D plines while assigning elevations (and vertices) only at the current vertices?
What about a simple series of commands to convert the 2D plines to 3D plines, then force the 3D pline to take on the elevations of the points at its vertices? (I think this would be my preference, but don't know any of these commands or where to find them.)
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Feb 29, 2012
By rotating points elevations change too!? I wonder what I am doing wrong!?
Just starting using Civil 3D 2012 version.
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Sep 11, 2013
I have a surface made by a wide array of points and a line of points that i need to use that surface to assign elevations to ..
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Nov 13, 2013
I recently upgraded from Civil 3D 2009 to Civil 3D 2014. In Civil 3D 2009 I was able to set the point style 3D modeling to flatten the point to a 0.00 elevation. In doing this I could move the point around freely using the nod grip without the elevation changing weather I used object snap or just freehand placed the point.
For some reason with 2014 when I grab the nod grip it changes the elevation to 0.00 as soon as I move it from the location it currently sits despite the fact that everything is set the same as it was setup for 2009. Is there a setting that I need to change to fix this or is there a new way to go about moving the point without using a bunch of different commands.
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Sep 23, 2013
I created 8 points (4 locations with 2 depths in each location) in the DWG of my AutoCAD Civil 3D 2013 project. I grouped these 8 points into 2 Point Groups: Point Group 1-high depth has Points #1, #3, #5, #7, and Point Group 2-low depth has #2, #4, #6, #8. I changed the 2D Wireframe to 3D Wireframe and on TOP view I saw Point Group 1 is on the top of Point Group 2 (because the 2 Point Groups have the same values of X- and Y-coordinates with different Z(elevation) value - see the first attached file. How can I change the TOP view to the TOP-FRONT view by using some Command to get this fixed TOP-Front view thar has the good separation of the 2 depths as shown in the second attached file?
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Aug 19, 2013
How do I accurately set the scale on a raster underlay based on 2 (or more) points where I know the distance between them?
In fact I would like to do this on 2 axes separately so that it stretches.
I am used to georeferenceing like this and getting raster underlays the right shape for the coordinate system I am using. How I can do this in AutoCAD, which used a very simple coordinate system.
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Dec 5, 2011
I have been working on a project and ran into some complications. I have an object that I would like to scale the length down, but leave the height and width as they are. I read around and found out I can use block and use that to scale the object. however, once I used block I was not able to use the Boolean operators to subtract from the newly scaled object. If I hold my mouse over the object, it is a called a block reference.
My question is, is there a way to change the y-dimension but still be able to play around with the object?
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Mar 26, 2012
I've completed a drawing, with dimensions and everything and I have to reduce it to 1:2 scale to fit my drawing frame. How do I do this without changing the dimensions? Every time I reduce it the dimensions halve as well!
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Dec 6, 2012
I use AC 2013 LT.
1)When switching between the Drawing and Annotate option to the AC Classic option a menu would appear with options to use the civil menu, mechanical or architectual. This has now dissappeared and I do not know how to acces it again.
2) Coming from a manual drafting background scaling appeared to be easier. I want to change the template scale shown in the title block from 1:1 to 1:5. This seems to be able to be done as it is highlighted. All my efforts save to enter it hard does not work, but this does not change the sheet scale. Changing the scale on the menu bar does not affet the sheet scaling
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Feb 8, 2013
I had to create a boundary map and place points to all corners. How to export these newly created points back into my data collector (Ranger) and also I'm trying to figure out how to print out a points list.
I stumbled on to this thread but I guessing that it's a different CAD year because my modify tab doesn't look like this. URL.....
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Mar 5, 2013
I have a large surface (over 1.5 million points and 20 000hectares)
I need to get a point file .csv from the TIN to be able to use it in another program.
-so i've extracted the points from my surface, but they are Autocad points.
-next step is to convert them to civil 3d points.
-I can not select them all when converting them or my computer crashes.
-so i select about 25 000 at a time, the converting takes roughly 10 minutes.
and i have over 1.5 million points to do.
how can i speed this up.
will more ram useful?
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Oct 9, 2012
I have recieved a file with many points and would like to convert them into COGO points in Civil 3D. The problem is; I would like to keep the hole ID's as I convert, I've made a few conversions and lose the hole ID every time (not showing in Name or Description). Is there a seting I am missing to keep these? My aim to to organize the COGO points in different point groups.
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Aug 17, 2012
I have a couple points that were part of an import event (data from a previous project) which I want to assign as control points for an incoming traverse, is there any way to assign those as control points? I can't seem to find a way to do that other than perhaps re-importing the specific points as control points and overwriting the existing ones.
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Apr 10, 2013
I have a project that was started by leaving all the survey data inside the "All Points" group. So, I'm concerned that when I enter my as built survey points, that even if I put them into their own group, that the original surface will still look at them and just rebuild to my asbuilt data, effectively cancel out the purpose of the asbuilt survey. Will this happen?
I want to take the original points and put them into a group of their own, but I don't know if that will affect anything or not? I have several wetlands already designed on that surface with volume calcs already done too.
What should I do?
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Sep 12, 2005
. How to assign proposed elevation to layout alignment along each station?. I know there is a way in LDT to assign proposed elevations to s specific range of stations or the full alignment, under menu "profiles/ FG Vertical Alignments/Create COGO Points" I am looking for the same one in C3D.
2. How to add connecting alignment label and station in profile view. For example I have an main alignment and in-between lot of other alignments are meeting with this alignment.
I want to show in profile view of the main alignment the meeting alignment's name and the station it meets with?
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Dec 1, 2013
How to get precise elevations at lowest and highest points. I need to get spots where the water flows and its precise elevation at that spot as analysis.
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May 3, 2012
In C3D 2012, when I needed to know what elevation a surface contour was at, I simply hovered my mouse near the point in question and a small window would tell me what elevation my mouse was hovering at. Now, in 2013 I am trying to do the same thing but the little window only has the name of the surface and no elevations. So, how am I supposed to know surface elevations on the fly? Is there some setting to turn that back on?
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Nov 20, 2013
We have a good size channel and the section for the channel varies quite a bit. We want to find the volume excavated in the channel between 2 elevations (it is the area of sand per the goetech report)? A template was not used to create the channel surface, breaklines and gradings were used.
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Sep 2, 2013
Sounds simple enough, but how would I subtract 2.300 from every point elevation?
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Dec 3, 2013
I need to project a surface/grading (or something of that nature) across my berm and have it intersect with the inside bank. This is better explained if you see the attached image. In the plan view you see 4 featurelines. Outside TOE, outside TOB, inside TOB then inside TOE. I need to project the outside TOE across the berm (shown in the section view) then create a new featureline where the line and inside slope of the berm intersect. Note that all the elevation shots vary as does the widths across the berm. What's the best way to do this?
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Feb 28, 2013
I have two different point groups that I am using in my drawing. One is from a survey done a few years ago and the other is from one that I did just the other day.
I don't have a problem inserting the points or whatnot, but the issue I am having is that when I click "Datum" to adjust the elevations of my new point group (to make my benchmark 100.00'), Civil 3D alters all of my points; including the ones from the older survey. Is a way to adjust elevations to only one set of points.
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Jun 29, 2012
I have a survey figure that no matter what will not come in with the correct elevations, its a spline (continous) curve that the elevations get blow up on.
Only thing I can think of is the when it starts to interpolate the curve it cant get the elevations correct, this only happens in the curved area, once it goes tangent everything goes back to normal.
C3D11
C3D12-13
Win7x64 6gb
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Mar 25, 2013
We are running Civil3d 2012. When converting a line or 3d poly to feature line, or just creating one it adds elevation points where it crosses surface breaklines even if you do not assign elevations. We want the feature to just have 2 elevations. The beginning and end. Is this a bug? Or is there another setting somewhere?
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Aug 13, 2013
I am working on laying out data for some survey crews along the centerline of the road. I have a BC and EC elevation, but the vertices along the CL are at different elevations, which were the original elevation of the poly line before being transformed into a 3D polyline. Is there an easy way to make the full line follow the slope from BC to EC other than manually shifting the vertices?
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Feb 1, 2013
I graded a commercial site with mostly feature lines. I added points where I needed them to get everything to work. After modifying my surface, I suddenly have zero elevations randomly throughout my site. They don't make any sense why they appear. Some are just added to my drawing and others are existing points that were changed to zero. I can go to a back up drawing from a few hours ago and redo some grading, but I would like to know if there is a way to just erase zero elevations from the surface. I remember LDD was able to create surfaces ignoring elevations below a set elevation.
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Jun 21, 2013
I have imported a survey file. When I insert the points into the drawing, the elevation changes to something that isn't even recognizable. When I view the point in the survey tab, the elevation is correct, when I view the point in the prospector tab it is different.
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Apr 19, 2012
I Created a Feature Line from Objects (a polyline). I added it to Site 1, gave it a name, layer. Do I Assign elevations during creation (conversion options)?
I set the Elevation to 8.5 (NOT From surface)
Then I go to
Modify Feature Line -
Elevation Editor.
Why are the elevations locked? I want to set them.
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Nov 29, 2012
Is there a way to lighten up the colors of my surface slope analysis that the rainbow gives me? My drawing will be going into a report and the colors are too bold. Pastels are a bit too bold.
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Jun 24, 2012
Using C3D 2010. Drawing looks fine in model and paper space. When I try and plot (or plot preview) contour labels are gone! How frustrating. They will not show up again unless I restart C3D and open drawing.
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