AutoCAD Civil 3D :: Surface Slopes On Grid
Nov 20, 2013
I was wondering if it's possible to add surface slopes on grid (similar to how there is a tool for adding spot elevations on grid). I can do them individually at a grid spacing but that's tedious, and considering you can add spot elevations on a grid, I'm not sure why this wouldn't be possible.
If there isn't a built-in tool for this, would it be possible to make a block of a bunch of one-point spot slopes and you simply choose which surface & the insertion point when you insert the block?
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Aug 2, 2013
I have a large ex surface that I have divided into basins and such. I know need to evaluate the slopes in these areas. To do the whole surface at once seems to not be possible. Is there a way in c3d to view analysis information for a section of surface for instance in a polyline or fence?
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Jun 6, 2013
I am looking for either a corridor style or surface style to display slopes while in plan view while working on a corridor. I know you can turn on slope arrows as a surface style, but I am actually looking for the grade to be displayed next to a slope arrow. Hopefully I am explaining it properly.
I just am looking for a better way to spot errors before putting surfaces into machine control without checking station by station in the section editor.
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Mar 6, 2012
Our provincial standard requires subgrade and subbase surfaces to have a normal cross slope of -3%. The base and asphalt surfaces have a normal cross slope for the driving lane of -2% and -5% for the shoulder.
I have been trying to figure out how to do this in C3D. I have thought of different ways of handling this for a straight tangent, but have not tested them. What is causing me the most grief at the moment is how to handle this in a curve with super elevation.
The transition will be different for -2%, -3% and -5% Runout distances.
Can C3D handle this? What about using Subassembly Composer?
(I should mention that I have tried with Subassembly Composer, but I am not sure how to deal with superelevation. -
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Feb 28, 2012
What approaches are available in civil 3D to takeoff the surface area of daylight slopes?Which do you recommend for given scenarios?
I tried compute materials but the volume report for cut and fill area is zero - so either I missed something or the compute materials for surface area does not work yet. Then, I tried the QTO manager and linked the corridor codes slope_link and daylight_fill to payitems. Slope_link has a QTO of 1,458,099M2 and daylight_fill has 913.39M2; I have more confidence in the daylight_fill takeoff.
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Apr 30, 2012
I am trying to create a label for slopes in cross sections for a surface created from breaklines using gade breaks as you can not weed segment labels
I am weeding the labels out based on the change in grade of the section profile and making the label text high very small of the labels I do not want to see. But the first label returns ??? because there is no grade coming in so I get ??? instead of something usefull like null. Any way to convert?? to something you can evaluate and use.
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Dec 15, 2012
Is there a way to create hatching for the slopes surface style instead of using solid colors?
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Oct 22, 2012
Any grid surface simplification tools? I had hoped to use grid surfaces instead of TIN surfaces to reduce the number of pieces I have to break up a large DEM into... but I need a way to systematically simplify the grid surface...?
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Dec 31, 2013
I tried to work with grading but it didn't work,
1 - The square helicopter pad is flat and grading with 2:1 fill, 1:1 cut.
2- The second FL is 2% slope down and grading with 2:1 fill, 1:1 cut.
3- The third FL is slope down to meet the existing road, both sides will same cut and fill.
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Aug 31, 2012
I am using Civil 3D 2012. I am drawing a water line in a profile with a vertical scale of 1" = 10'. I am trying to draw lines at 45 deg angles to account for standard fittings.
Now, I tried to block a 45 deg angle and exaggerate the y scale, but for some reason this does not work well mathematically. Is there a way to draw lies at a certain slope, or at a certain angle from another line, while taking into consideration the scale exaggeration?
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Nov 15, 2013
I have a ditch and a road that need to follow separate profiles but be integrated with each other as a single corridor and the ditch's 3:1 slope needs to meet up with the road's 2% slope. Is it possible to have the two subassemblies target each other without having to create a dummy surface or a feature line for targeting to?
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Apr 7, 2013
I have a surface and i have the outer border of a pond i want to create (see attachments). What makes it difficult for me is that different areas of the pond have different slopes. The area marked as "A" has a slope of 1:5, the are has a slope of 1:2 and the rest of the pond has a slope of 1:1.
My problem: I do not know how to grade the borderline so i end up having a surface with different slopes as my pond.
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Dec 24, 2013
I am trying to create in my sub assembly a daylight with a variable slope to a graded ditch then it back slopes to natural ground. (image attached). How can I do this in Civil 3d 2012?
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Oct 23, 2011
Is there any subassembly can get variable slopes depend on depth like in Land desktop as you can see in the attached file.
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Oct 8, 2012
We Need an expression to round Pipe Slopes to the nearest 0.5% slope. We were working with:
ROUND(({Pipe Slope}/0.5))*0.5
but it only returns 0.00.
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Feb 26, 2013
I am new to Civil3D And I am using it for one purpose, Im working at producing planning drawings for solar farms, and the client has asked to me produce topographical surveys highlighting where the gradient or the slope is greater than 15 degrees. Is there someway i can use Civil 3d to do this?
Ideally im looking at producing a 3D Model which has shaded areas for the areas which are above 15 degrees. And Hopefully another shaded for areas between 15 and 10 degrees, 10 and 5 and 5 and 0
The topographical surveys i am downloading at the moment are from a site called promap and are DSM Type?
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Dec 6, 2012
how to create an assembly with different inclinations of terraces and slopes
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Nov 29, 2013
I just want to start by saying I have been extremely impressed with the speed and effectiveness of finding Civil 3D solutions through this forum. However I do not think there is a way to solve the problem below without making a custom sub assembly.
There is a common problem that I run into when modelling earthworks on airfields. All Taxiways and Runways will have sepirate areas that determine the slope of earthworks in that area. As an example I will explain my problem for a Runway.
Any ruwnay will have a Strip area (150m offset from its centreline) and a Clear and Graded area (105m offset from its centreline). Therefore any earthwork slopes between the runway pavement edge and 105m offset from the centreline will be determined by the requirements within the Clear and Graded Area. Likewise any earthwork slopes between 105m and 150m offsets from the centreline will be determined by the requirements of the Strip area.
My problem is that when overlaying a runway, the new earthworks required may extend beyond the clear and graded area (and into the strip) at some points but not in others.
Therefore I would like a sub assembly that does earthworks at a set slope unless it passes the clear and graded line where it would then continue the earthworks using a different slope. It should be pointed out that the clear and graded line will be present along the entire length of the runway and the earthworks may or may not extend beyond it.
Just for the sake of clarity, when I say earthworks, I mean the subassembly within autocad that will "Cut or Fill" at a set slope until it reaches a chosen surface level. Similarly the "clear and graded line" and "strip line" are 2D and mearly delineate the areas in plan.
save time and make my model more dynamic. As it stands I have been getting around this problem by modelling the earthworks at the initial slope (clear and graded area) and then manually amending the corridor to use a different assembly where the earthworks extend beyond the clear and graded line.
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Jan 6, 2014
Need to identify areas of 100sf or less within slopes exceeding 40%. Is there a simple way to identify this within C3D?
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Dec 15, 2008
I have an existing ground profile, and a design profile. All I want to do is label the slopes of the design. When I click my line label style and turn on the text it labels the existing ground and the design ground. I cannot find the setting in my two profile styles to turn the slopes off in the existing ground.
Oh, how can I get a tick on the V.C. dimension line?
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Jan 18, 2013
I saw on you tube channel [URL].........
How to make this label where I can show the design slope in plan.
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Jan 18, 2012
Understanding that composite volumes are typically more accurate, I have a reason to evaluate the volume between two surfaces via a grid volume. Easily created a grid volume surface using a 50' grid (50' is large for this site, but wanted to get a feel for calculation time).
Question: Can you change the grid size without creating a new grid surface? Ultimately I woud like to explore the difference in volumes based on grid sizing without creating a long list of surfaces. One would expect that you could chage the grid spacing in surface properties, but the values are non-editable.
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Mar 21, 2012
I have a grid of around 100 points which are spread reasonably evenly.
I need to turn them into a surface as to see the height change between the points more clearly.
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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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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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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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Jul 29, 2013
I have a project involving 3 programs. I am creating a planned development in 3d to be 3d printed when finished. The project is a 5 acre tract containing 8 buildings. I have built the surface in C3D and each building in Revit. The buildings are not in the same Revit file. For my solid work, I will bring the files over into 3ds Max Design to section into smaller quadrants to build in the 3d printer.
The questions:
Would it be better to import the surface into Revit to merge surface and buildings together?
Would it be better to import the buildings into C3D to merge entities?
Would it be better to bring those entities into 3ds Max and then merge them into one? Will 3ds Max Design allow me to insert entities accurately in the environment?
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Sep 15, 2013
I need to create a sub-set surface from my main surface. not sure what the vernacular is for a "subset surface" in c3d but i do have a feature line that bouinds the desired area, but that is as far as i can solve.
i did try creating a new surface - pasted the main surface in the edit definition, then deleted triangles until the boundary alighned wiht my featureline. This seemed to work, but when i view the properties of the smaller subset suface, it shows a mimum and maximum elevation that is incorrect.
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