AutoCAD Civil 3D :: Editing Existing Surface Using Edit Surface Command
Nov 14, 2012
I am trying to add points into a surface. I have done this before without any problems, but now I am having issues.
When I ID points which makes up the surface it gives me the correct Z level e.g. 24.5m, however when I hover over the surface it shows me the surface name and a different z level e.g. 0.65m. What is the reason for this difference in z levels? I think this may be causing the issue I am having when I add new points.
I select the surface and use the 'edit surface command' in the ribbon, choosing add point.
When I add a point at the level I require(23.89m), it puts it in a lot higher than the surrounding area, so I tried to put the point in to the lower z levels (0.4m) it puts it in a lot lower!
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May 28, 2013
I have a surface that I created by joining to surfaces, and now I want to reduce my boundary, how can I edit it?
windows 7, intel I7, 8 MB RAM, civil3d 2013.
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Dec 10, 2012
My goal is coming up with the volume bounded by the design surface and the existing surface. I don't have the design surface modeled yet.
Do i need to create alignment offsets?. Alignment 1 profile view is also attached. Then Alignment2.
What about starting with alignment1 profile view? Since I have created a polyline as the design profile ?
how do I shrink labels? Where is it in the settings ; the Align folder had been check.
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Mar 1, 2013
Im currently using an addon for Civil 3D called Novapoint. It allows me to create 3D models of surfaces made out of 3d faces and easily models cut and fill 3d-models for me.
The only thing i need to create a cut and fill model is one or several ground surfaces (existing ground, earth layers, rock etc. whatever i need) and a closed polyline/3Dpolyline that represents the level I want my cut and/or fill model.
I enter the spcifications I want such as; earth cut angle, rock cut angle, fill angle, select which surfaces i want to include in the model calculation and select the polyline.Novapoint then calculates the cut/fill model from the surfaces to the polyline and models the different cut/fill angles and gives me the results in a 3d-face model and a specification of the volyme of rock cut, earth cut an fill.
1. Novapoint is quite unstable and crashes alot
2. You cant create profiles out of 3d faces
3. Novapoint does not automaticly combine the start surfaces with the modeled cut/fill surface
4. A large surface made out of 3d-faces demands alot of computer power
So I want to how I do the same that Novapoint does for me in Civil 3D? (I have access to Civil 3D 2007-2013 depending on which one you're using)I know I can take the 3Dfaces i created in Novapoint and make a surface in Civil 3D with them but I want to exclude Novapoint completely.
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Aug 28, 2013
I have a proposed surface that has been made by selection polyline with a z elevation as contours. Is it possible to have civil 3d easily change the weeding and supplementing factors to a tighter value after it has already been made?
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Oct 4, 2013
I was trying to edit a corridor surface manually by editing points and tin lines but for me its much easier to edit the contours itself so I explode the surface into polylines and fix the contour issues but when i make it into a new surface the Surface does not look clean anymore. When I look at it in the object viewer it looks rough and jagged and doesn't look like a road at all, however my original corridor surface did look clean with perfect roads and cul de sacs i just wanted to fix the contours outside the road. I tried extracting it like i should have done in the first place but when i add the contours to a surface it still looks ugly and jagged. Another thing is that when you look at it in 2D or plan view the contours look exactly the same but when i look at it from a perspective view or 3D that's when you see the difference.
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Sep 28, 2012
I'm trying to create an all new existing surface over existing ground. I have a TIN surface of the EG, and I have drawn overlay splines that describe the new surface, but how to go about creating that design surface.
It is a compound surface, open on one end and closed all around on the other, somewhat like a half of a football stadium, but with an irregular upper edge because I am needing to figure out cuts and fills to manipulate the EG into this new surface without costly major terraforming. There is about 40-50' vertical elevation between the "field" and the upper rim with a generally constant 7-10 deg. slope all around. I'm just at a loss to figure out how to approach this project, and am quite new to Civil 3D.
Civil3D 2013
MacBookPro 17 - 2.4GHz Intel QuadCore i7 (Late 2011 build)
Microsoft Windows 7 64bit
350GB Bootcamp volume
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Nov 15, 2012
Some background: We have a composite surface of existing surveyed contours as a TIN pasted into existing aerial contours that we received from a client. We used polylines to generate our proposed contours, and then generated a proposed surface from that. We've made a blank surface, pasted in the existing surface, and are trying to paste in our proposed surface... only the existing contours outside of the proposed suface no longer line up correctly once we do.
We've tried applying the method laid out here: [URL] ........ (and the link referenced in the bottom) but are still having trouble getting the surface to work. We've tried offsetting as little as 0.25' and as much as 5' with the feature line draped over the existing surface, but it seemed that the greater the offset, the greater the discrepancy.
Just to make sure we even tried that correctly - should the breaklines that we add be standard or non-destructive? (I've tried it both ways with little success either way, so I don't know if it matters much in this instance, but perhaps for future reference it would work.)
I've attached a screen shot of our surfaces. The pink and green lines are the proposed contours, the white dashed are the existing. The outer red line is offset 0.25'. As I've mentioned, we've tried offsetting various amounts with decreasing success.
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Sep 9, 2013
Civil 3d 2014.... I have existing surface and a profile with 5 sample lines. All of them are good except 1 sample offset. I can do I quick profile and the profile looks like it should but if I generate an actual profile 90% of the profile is off. I have already tried reoding the alignment but it looks same on either one.
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Oct 18, 2012
How to rename the existing profile “profile from surface”? On the right click there is no such option!
Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.
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Jun 11, 2013
I have been given a survey on AutoCAD which was orginally 2D with the levels written in text next to it. I changed each point (690) to include the level in the Z-direction. I am trying to calculate volumes of topsoil removal and then cut anf fill volumes.
So I opened up Civil3D in metric template and imported my drawing as I have not been given a ddata file with the co-ordinates. Unfortunately I am having trouble creating a surface between the existing points.
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Oct 23, 2013
I have a survey of an existing road surface and need to show where water will collect (pond). I can obviously use the water drop function and show where water will flow over the surface, but what I need to show are the resultant pond extents on the surface.
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Sep 27, 2013
I have an existing surface and I need to creat a surface using contour lines of a at the high point on a spillway to the bottom of my pond to calculate volumes. How do I do this?
AutoCAD/Survey Tech
Merritt LS L.L.C..
743 Horizon Ct. Suite 100B
Grand Junction, CO 81506
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Jan 16, 2013
I am having some trouble creating a TIN from a point layer in Civil 3D 2011. Would the best course of action be to extract the points from the drawing and creating a surface from there, or is there a way to create the TIN around the existing points in Model space?
I'm much better versed in AutoCAD, but excited about furthering my understanding with Civil3D.
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Dec 15, 2013
I don't undrstand why my assembly line increased after the existing surface in cut and fill condition, it should be stop at the existing surface. due to this problem my cut and fill quantities is not coming accurate. I'm attaching the screens shot of section. I'm using civil 3d 2009 32 bit software.
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Mar 27, 2012
I have a rather large project for a roadway reconstruction. Therefore, the existing utilities are in a separate drawing and the existing ground surface model is in a separate drawing. All the above surface items (curb and gutter, asphalt, concrete, signs, sidewalks, landscaping, etc..) are in the master drawing. I then xref'd in my utility drawing and though I would use data shortcuts for my existing ground surface drawing. I took the surveyed triangles (3d faces) from our raw survey drawing and copied them into my surface drawing, created a surface from the triangles, created a boundary and such. So far everything is good. I created the working folder for the data shortcuts for this project and saved the drawing and closed it. I went into my master drawing and clicked on "Create Reference". I did not promote. The reference came though and everything is fine. Now I want to add contour labels in my surface drawing which I did but they do not show up in my master drawing but the contours themselves do. Do I have to promote this drawing into my master drawing so I can create the contour labels in my master drawing? I guess that is fine but the issue is we have small areas of topo that will be added as needed down the road. If I promote the surface drawing into my master drawing then when I add topo to the surface drawing, it wont update in my master drawing.
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Aug 2, 2012
I have an existing surface with a steep slope and a feature line for the edge of a proposed walkway. I need a buffer of 25m on either side of the walkway but offsetting doesn't take the grade of the slope into account. How do I grade down the hill from the feature line at 25m to match to the existing surface?
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Aug 28, 2013
Every week I recieve new survey data (typically around 20 points) to insert onto an existing surface of our local landfill.
The surface is displayed as minor and major contours. The new survey data typically always has higher elevations then the exist surface and shot roughly 2 meters apart.
Here's my issue...when the survey data is inserted and the surface is rebuilt, the contours seem to turn into little cones at each new point. see attached...
how to eliminate these 'cones' so the surface contours seem more relistic?
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Dec 3, 2013
I have a point in my surface that has a bad elevation. My question is this, I unlocked the points and edited the point containing the bad elevation and I am wondering why my surface is not automatically updating. I have a breakline in the surface that uses the "bad" point and by editing the point to the correct elevation, I was assuming that my surface would automatically update, which did not happen, so I selected the breakline and edited that also to the correct elev., and the surface still did not update until I chose "rebuild surface" even though I had "rebuild surface automatically" turned on, so I am a bit confused.
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Jun 13, 2013
Any real good setting to edit surface in 3D. I typically just set it to shaded, and i find that i have difficulty making out details. I like to have Tins and points displayed and occasionally turn on contours. Also I hold shift and the mouse wheel to rotate the views.
Any settings they feel make it easy to tell what is going on? Or a good way to 3d rotate without having to constantly use zoom extents to find the surface?
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Jun 12, 2013
I have a pumped storage project where I would like to know the water level if a volume of water is removed. Is there an easier way to do this? Currently I have my drawing set up with my base surface and various top water level surfaces. I have been creating volume surfaces for each TWL and populating a spreadhseet that indicates how volume and surface area differs with TWL. It would be incredibly handy to work this in reverse ie ask the volume surface to lose or gain a required volume of water and update the TWL accordingly.
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May 3, 2013
I am trying to create a localized existing surface from a very large topo. I promoted the existing surface shortcut into my drawing, then created a cropped surface to be put in a new drawing. After creating the cropped surface the new file shows that a surface has been created, however, the surface contains no data. I am using c3d 2012.
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Jun 20, 2012
Is there a way for Civil3D to create/generate/extract a contour of a specific elevation such as 105.53 from an existing surface?
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May 15, 2012
if i want to target the existing surface beyond the edges of my road/sidewalk, should i use the link slope to surface subassembly at both ends? i want the model to test if in a cut or fill situation, and then target.
Civil 3D 2013 SP1, Win 7-64 bit
12GB RAM
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Mar 5, 2012
So we have to adjust the elevation of hundreds of drainage structures from their existing elevation to the new finished ground elevation.I know we can give this information within the structure label by adding a reference surface but we would like to produce a table with three columns:
Structure No. Existing Rim Elev. Proposed Rim Elev.
How to produce such a table?
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Oct 13, 2012
I'm so tired of wasting time cleaning up holes in surfaces using the surface edit tools.
For some reason when i'm using the add line tool, i need to click the same two points 6-10 times before it actually closes or even more frustrating; it just doesn't close. When I review the event viewer error, it says cannot add / crossing break line... This isn't true, there are no breaklines being crossed.
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Jun 6, 2012
Site layout has moved and rotated a little. Have spot elevation labels in my sheet but unable to use align command. Align command is able to be used but only moves labels rather than move and rotate.
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Dec 2, 2011
I often have to do storm pond surfaces that (for the purposes of planning) are flat on the bottom. These surfaces are created from a combination of survey data and grading groups and the tin of these surfaces is perfectably acceptable. However, when contours are shown, the flat bottom is shown with contours jig-jagging all over the place.
The attached image shows a comparison of the same pond. The top was created with survey data and grading groups; the bottom was created using contour data only. The generated surface on the top shows the bottom contour going in different directions and has parts where the an expected contour is missing.
How to correct/manipulate the surface to show a proper flat surface?
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Oct 22, 2012
Has instances where you set your tolerance for the maximum triangle lenth to say 50m to reduce the amount of triangles along the edge that run at long distances. When I do this I end up with multiple surface holes and I'm not sure why as there are points in the area.
I thought well maybe it's because i should've reduced my max triangles first then added breaklines. Would this matter? I also thought I could add a line to the surface to fix the holes vs. deleting surface lines along the entire edge of a surface for many many miles.
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Oct 2, 2012
I am issues with DEM files that I am downloading from the USGS website.I download 24k, elevation for the area I need. I then choose staged 1 second, add a surface to a blank drawing, then upload the DEM files to the surface.
The surface imports correcty, but when I try to import points taken by a surveyor on the same drawing, they plot incorrectly.The DEM surface and the points from the surveyor do not correspond. Also, the DEM surface is in meters, not feet. I have tried changing drawing settings, datum types, coordinate types, etc.
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Apr 4, 2012
Is there any way to change the referenced surface on a Surface Elevation Label. I can see the surface in the properties but cannot change it.
C3D 2011
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