AutoCAD Civil 3D :: Import Point File And Assign Elevation Based On Existing Surface
Apr 12, 2012
I have a bunch (hundreds, so manual input not an option) of X,Y points without elevation data that I would like to import into a DWG and assign an elevation that is based on an existing surface object. Is there a way to do this for a point file? The command for inserting individual points would be the "Create points - Surface > Random" but I don't see a way to do this in a batch type method where i have my PNE formatted input file to just move the points to sit on the existing surface.
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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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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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Apr 16, 2012
i have some existing drainage pipe and structures in a base plan that i need to change the invert (which is the easy part) and the top elevation to the existing top elevation that does not meet the minimum presect in civil 3d 2012 is there a way to change these min. to match my exisitng elevation for example i have a catch basin invert is 15.45 top is 17.56 with a 18" rcp the cover will be less than 12" and i need to change this.
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Dec 19, 2012
When I snap a point to an object, the point takes on the elevation of the object. I would rather the point's elevation stay as is.
-changing osnapz variable
-latest civil 3d service pack
A few weeks ago I did not have this problem but once my computer was switched to the company's global server and c3d was reinstalled the problem appeared. Furthermore (post switchover), when a colleage of mine prepared a simple test drawing with just a line and a point, he was able to snap to that line without the point changing elevation. When he sent that drawing to me and I tried snapping the point to the object, the same problem occured with the point taking the elevation of the line object. I suspect it is a system variable issue
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Oct 21, 2013
Can you set pipe structures and assign your own rim elevation? I don't want to use surface elevation.
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Jun 17, 2013
Can you manually create a new cogo point and have it pick up the elevation from a 3D entity that you snap to?
I found this thread from 2010 that says no at that time.
[URL]
Is this still not possible with C3D 2013?
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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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Mar 18, 2013
I think this should be an easy thing to do, but I am having problems figuring it out. I need to repath the location of a point file being used in a surface. My surface will not rebuild because it can't find the point file originally used. Drawing was used on a different computer system, so the point file directory is now pointed to the wrong path.
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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 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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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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Jul 5, 2013
When working in a drawing with a surface referenced there is usually a flag attached to the cursor that reveals the surface and the elevation of the spot the cursor is hovering over; mine has disappeared.
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Nov 27, 2012
When I import my points (.txt), all of the points go to whatever layer is current. They don't go into their repective layers anymore.
Also, for surface, the surface doesn't even show up now. This is the 1st time with this problem too. I created the surface, assigned the point group and still no contours.
Also, out of curiosity, during the point import stage....what is "assign offset to point identifiers"? does this mean, if points are right on top of each other, it will be automatically offset to read?
HP Compaq 8100 Elite
Win 7 Pro SP1 - 64Bit
8GB RAM
i7 860 @ 2.80 GHZ
AutoCad Civil 3d 2012 SP1
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Jan 17, 2012
What I wish to do is to assign a set of points a sequence of point numbers (or custom properties) of my choosing. For example, I have the following points:
100
102
104
105
107
I wish to assign point 100 -> 1000, 105 to 1001, 107 to 1002, 104 -> 1003, and 102 ->1004. Basically, I am looking for a command or utility that implements the "TCOUNT" (using select-order) command, but for Cogo points instead of text. The renumber points command appears to only work with offsets, and does not eliminate gaps. I can sequence the points if I select the points I want, then copy them -> set duplicate points to sequence from the range I choose, but this does not allow for reordering of point numbers. I tried individually selecting them in the order I wanted, but didn't change the order in which they were numbered.
Alternatively, I can leave the point numbers the same, and assign a user defined property that I can use to sequence the points in the order of my choosing. However, I'm not sure how to go about assigning the sequence I wish short of typing in each value individually; obviously non-ideal.
A third possibility that presented itself to me was to create new, correctly sequenced points that overlap exactly with the old ones, and then somehow merge the two sets together. Would there be a way to merge the old points and the new ones based on the fact that the two points have the same X-Y coordinates? Preferably done in CAD itself; the last resort would be to export both sets of points out to excel, then do some fancy manipulation in excel, then reimport into CAD.
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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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May 22, 2013
I used the Volume dashboard to cal volume so when I view the surface in object viewer or 3D I see my TIN volumes surface at zero elevation is this right? I think the reason is because they want us to see both surface so they are not on top of one to another.
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Aug 28, 2012
i created section view as in pic1. In Bands, Existing surface elevation labels at existing surface grade breaks, top of road elevation labels at top grade breaks, datum is the same. Can i add existing surface elevation labels at top of road grade breaks? (pic2)
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Sep 27, 2013
I'm getting a zero elevation for the surface I create when I compare surfaces to get volumes. What am I missing?
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Jun 26, 2013
I have a drawing that someone else created that has a spot elevation label for a surface. It labels the surface (PAD) then automatically subtracts a set distance for another elevation (GFE) and adds a set distance for another elevation (FFE). After doing some research, it looks like it was created with an expression?
I have two questions:
First, where to go to get a better understadning of this? I'm not familiar with expressions.
Second, where can I find the expression in drawing to make an edit to the set distances. I can remove the GFE/FFE as they are separate components in the label style, but I don't see where to modify the distance it adds or subtracts.
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Apr 25, 2013
I have created a surface, when I hover over a contour on it I used to get name,style, layer, elevation. Now I get them all except elevation, I didn't change anything (not on purpose at least) in my drawings.
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Feb 8, 2006
I've tried to create a surface analysis by using a point group reading xdata to set the elevations and when I set my surface properties to display the elevation shades it will only allow me to set the range to 5 or less. All of the other analysis settings for direction, slope, and slope arrows allow me to input the nuber of ranges I want, but I need the elevation analysis.
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Apr 17, 2012
In the previous C3D 2012 version I was able to set surface transparency just setting it on a layer with defined transparency. Example: I set my "existing ground" surface to a created "EG" layer (example name) and set transparency layer to 50% (example, again) and it WORKS! My surface become transparent...
But now, in the C3D 2013, I can't get the same results... my surface is not getting transparent. I already tried to turn off/on hardware acceleration and adaptive degradation and show/hide transparency.
More details: I can get transparency on points, triangles, contours etc... but not on elevation, and this is my priority.
Autocad Civil 3D 2013 - Infrastructure Design Suite
Windows 7 64 i7 860 @2.80GHz 8GB Ram Quadro 2000D
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May 3, 2012
We work with Hydro graphic surveys that have large numbers of points. We would like to be able to display girded spot heights colored to represent the elevation. (Similar to elevation banding)
I have created a surface and then created surface elevation points on a grid with spacing of 15m. I have tried looking at setting up a style that will adjust the color depending on the elevation ie 0 to -1 = red but haven't made any progress.
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Aug 16, 2013
I have a question about pipeline networks.
I have a civil3d pipe network that has modeled by my co-worker before.
Now I want to put that pipe network on new surface and get rim elevation from surface automatically and also after stretch it can update rim elv based on that surface.
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Jul 21, 2013
I wanna interpolate points from surface but only in that area where my sample lines intersecting with the surface. There is a point creation tool that makes this based on polylines but I have to many data and it will get to much time to do this. So, for better understanding I attached some pictures, in the first picture it is shown the final result which I have made based on polylines, but here is also a problem, the tool is not putting points where the surface is changing ( on my second picture I highlighted with red circles).
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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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Feb 18, 2013
I got this plan from a third person and, the point from the survey have the property " bloc ". In their attribute property, I can see the elevation value. but in the z of the actual bloc, it shows zero. I would like to tell C3D to use the attribute elevation for his actual Z in the drawing. How can I achieve this ?
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Nov 15, 2013
is it possible to export elevations from a surface at a given interval? i can easily export all the data i used to build the surface, but now I am wondering if its possible to export/extract the surface to a CSV or TXT file with a position and elevations, say, every 5 feet?
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Jun 24, 2013
I have a surface with all sorts of heights, and want to add color to different heights. Getting the color there is not that difficult, but how do I swap them around? i.e. red is 'low ground' and blue is 'high ground'. In Holland we use it the other way around though, so blue should be low ground and red high ground.
Where exactly do I change this? I've tried it in the surface style tab, surface properties tab, analysis tab, and some others, but no success so far.
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