AutoCAD Civil 3D :: Creating Tangent Curves
Jun 29, 2013
I am used to drafting surveys using Eagle Point Coordinate Geometry & Boundary Survey & I am now moving over to C3D, & I am trying to reproduce a boundary survey in C3D 2010, when it comes to Tangent & Non Tangent curves there does not appear to be any routine that allows you to create them in logical sequence or otherwise from the geometrical info provided on paper maps i.e. Radius, Delta Angle & Length, are there any survey techs on here that have been able to resolve this issue?
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May 15, 2013
I created a horizontal alignment from objects and upon importing it c3d seems to have taken liberty to arrange the lines in order it sees fit. Is there a way to rearrange the alignment tangent and curves and change their direction?
Civil 3D 2012 SP4.0 Windows 7 Enterprise 64-bit
C3D 2014 SP1
Dell M6600, Core i7 @ 2.3GHz, 16 GB ram
Dell T3500 workstation, too much ram to post
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Aug 4, 2013
Is it possible to have a tangent constrain on multiple curves?
see enclosed rough sketch, i would like the curved free end or the arm to be in constant contaced with the wavey top line on the other part, the wavey line is constructed as 3 curves but i can only get the tangent constrain to apply to one of the curves.
i would like the tangent constraignt to move between the curves so the part stays in constant contact with the wavey line. this is just a mess about sketch i suppose a real world instance will be a wheel following a shaped cam plate.
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Dec 14, 2011
I have created a bin/vat/tub using sheet metal. I started with a contour flange. I then copied the sketch and pasted into a new sketch off the flange for a contour roll feature. Then a flange, roll, flange, roll, flange and roll. My trouble starts at the last flange. I'm trying to construct the flange exactly as I have created the features before. I set the distance, select the profile (it shows the flange on the screen), hit apply and that's when my message shows up. "Non-tangent curves found in path: flat pattern cannot be correctly created. Edit sketch and add constraints to the curves. The sketch is fully constrained according to the lower right hand corner and the auto constrain button.
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Mar 20, 2013
I always draw a polyline to define my alignments. When selecting the polyline for the alignment, in the Create Alignment from Objects box, at the bottom, the default is to "Add curves between tangents". Where do I turn that off so default in NO.
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Sep 9, 2013
Can we automatically add sample lines at vertical curve points (e.g. BC, EC, Bottom of curve) ?I need to show the sections at these vertical curve key points.
I am using C3D 2011 but could not find that option when creating sample lines in a station range.
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Oct 22, 2012
Is there a way to use the curve driven (rectangular) pattern referencing two tangent curves (an arc and a tangent line). I'd like to be able to create this pattern of slots in one pattern, otherwise I'll have to make two cut features at each end and use one pattern for the straight and another for the curve.
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Jun 18, 2012
Working on Acad2012 3d Civil. I draw a circle of 4000' radius and another one of 2000' radius. I put a tangent line between the two circles and I do see the tangent symbol but when I zoom in real close, it's not. So now I can't trim the excess radius of the two circle. I do have a trim line pasted the two supposedly tangent points. Is this a CAD issue or is their a variable to change that actually makes the lines tangent.
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Aug 1, 2013
I have a long (2+ mile) alignment that has many "tangent intersection labels" which have station and delta angles. I need to create a table that lists the stationing and the deltas. How I can get this info. I have tried pipe networks and alignment tables w/o success.
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Mar 18, 2013
I believe that I need to define a custom Expression and then add it to the Label Style of a Tangent Intersection.
1) I'd like to add the max superelevation (e max) value of a curve to the label. This might be impossible.
2) I'd also like to add the design speed value to the label as well. This could be pulled from that value set in the design criteria of the alignment creation.
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Jun 19, 2012
I need to lable the delta of a PI in an alignment where one segment is an arc and the following is a non-tangent line.
Geometry points don't offer delta and Tangent Intersections won't label at PCs and PTs.
Is there an expression that can be used?
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Oct 28, 2011
Many times I see that these types of irregular shapes which comprise of spline curve are created with very less or no dimensions, so I want to know how this spline curve was created and can be controlled, if I want to create it in an exact manner what dimension I should use ?
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Oct 10, 2012
I want to make a curve label with all its elements (radius,tangent...) and the data of widenning and superelevation on the curve?. I attached the label that I want to create on C3D.
C3D 2012
Win-64 bits
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Nov 8, 2013
I received a drawing where I have to add Bearings to an alignment and Right-of-Way lines. I have a Line Label Style that it works for that purpose. These new bearings are "Alignment Tangent Labels" and we need them to be "MTexts"
Select & explode once, and you get "Block Reference"
Select & explode again, and you get "MText"
Once that is done, unfortunatly, I get "3D Faces" objects in the background. Invisible on the drawing, but visible on paper once we plot them. The only way to remove them is by selecting around the new MText until I click on one, then, right-click, Select simnilar, Delete!
Is there any way to prevent that to speed up the process???
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Mar 18, 2013
How to get a tangent bearing or radial bearing to show up in the legal description writer? All I can get are their opposites. Is there some code that I can add that will swap their direction (say NE for a SW)?
The convention out here (OR/WA) is to show a radial bearing (from the PC to the radius point) or a tangent bearing (into the beginning of a curve) for any non-tangent curves. So far, I haven't been able to figure out how to do this automatically.
Also, any good guide or list of variables for using the Parcel Reporting for legal descriptions in c3d? I really want to know what ALL the different pieces of data are that I can use in the legal writer, and how to manipulate them.
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Mar 16, 2012
Heres the issue;
I created my main corridor which is a 4 lane arterial with ditching on both sides targeted to my prelim surface. On my main corridor i have several intersections and approaches which i created intersections for and set the targets so they are correct, i also created secondary roads for all intersections. Now that it is visually correct there is a few things i would like to do.
1) Combine all intersections to my main corridor and create surface for adjusted volumes.
2) Raise combined corridor and intersections to adjust cuts / fills so that all attached intersection and adjacent corridors adjust with the main corridor.
Do i have to go to my main corridor profile and move each curve and tangent separately, then check all other profiles and intersection to insure everything has been adjusted?
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Aug 30, 2013
How do I go about creating text that curves in the middle a'la these examples -
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May 4, 2012
Im using Civil 3d 2012 and I couldn't find the function that I could offset the smooth curve alignment as shown on the attached pdf. I've looked through the offset alignments but those linear, curve-cube-reverse curve, curve-line curve doesn't work much.
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Apr 17, 2012
I have alignment with 2 curves at the beginning and end that I want to keep. It has a few PIs in between ke that are not supposed to have curves, but Civil 3D added them in (very short 200 ft radius curves), but I need to take all but the first and last curves out.
I tried setting Constraint Editing - toggled OFF lock all parameter constraints. Then I went into the data and tried to change the parameter. Can't get the curve out. Is there a way to convert a PI from one with a curve to one without a curve?
I can't afford to redraw this alignment - it's being referenced via Data Shortcuts to multiple drawings being used by me and my designer / already has my design profiles and existing profiles attached to it.
How to do this? - Delete the curves and make them PIs only? (without curves).
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Nov 15, 2013
Toolspace > Settings > General > Label Styles > Line
When I create a line label, one of the components available is “Direction Arrow”. This component is not available for “Curve” labels. I would really like to use C3D labels to indicate direction (I realize curves don't have a 'direction', but I don’t mind manually flipping and reversing the arrow). Is there any other label option in C3D that will draw a direction arrow for curves?
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Jan 24, 2011
I'm working on a runway in Civil 3D 2011. I want to transition cross slopes along the runway. i.e. 1.5% for sta 1+00 to 10+00 and then transition into 1.0%. I thought super elevation would be the best way to do this (I dont want any actual super elevation, just transitions in cross slope). When I select the alignment and "Calculate/Edit Superelevation" i get the following message in the commanding line:
"_AeccCalcEditSuperelevation No superelevation data has been calculated for the selected reference alignment." It does not bring up the wizard.
My runway alignment doesn't have any curves and I'm thinking that's the problem. Is is possible to create super elevation without curves?
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Jun 5, 2013
how to get the Horizontal Curve Report saying left / right curve details in autocad civil 3d
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Apr 12, 2012
How can you add the chord bearing, chord length, and tangent to an alignment table with the curve data in it? I have the length and direction but cannot figure out why the others will not load and update in the chart. I am using Autocad Civil 3D 2012
Autocad Civil 3D 2014
Windows 7 Prof. SP1 (64-bit)
Precision T3500
Intel (R) Xeon(R) CPU W3550 @ 3.07 GHz
6.00 GB
NVIDIA Quadro 4000
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Mar 11, 2013
I have an alingment and profile, but I cannot use the layout tool to create a curve (vertical)...what I am doing wrong. I select the profile in profile view and right click to select "edit profile geometry" and get the layout tool bar but cannot select to draw a curve...
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Apr 23, 2013
I have a file saved in autocad 2013 (dwg file extension) that contains level curves and points similar that an autocad civil 3d file and also have the layers. I want to convert this file to a civil 3d file for doing section of the curves whit the program. I don't know if it exist a method or not directly or indirectly.
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Apr 27, 2012
When i try to Add a Alignment Table for curves , and everry time i select the aligment or it's lable , it tells me that no Item Found,now what exactly i'm supposed to select ?
i use C3D 2012
Sony VPCCW26FA
Intel Core i5 M 520 @ 2.40GHz
8192MB RAM
NVIDIA GeForce GT 330M 512MB Dedicated
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Nov 13, 2012
I have noticed since using c3d 2013 circle "markers" appearing at the curves on my alignments. I can't find the control to change / turn off?
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Oct 15, 2012
I noticed when you put in vertical parabolic curves onto the profile tangents it will ask you if you want length or k.
however depend on which one you specify. it will hold on to that value when it comes to changing the tangent locations. for what i am doing now i want k by default. but accidentally i put in length because i just went through all the pi's quickly to put in the curves. but i see no control which allows you to control which type to hold. this is a property inside the vertical curve but it's not exposed to user. once you create by length that's it. until you delete the curve and re enter using k then it will hold k.
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Jul 19, 2013
I haven't used Autodesk directly since Land Development 2i. I remeber being able to draw lines by distances and bearings with the numeric keypad. The bearing quadrant / DMS input was a fast way to draw parcels from an existing map. When I got to a curve, I remember being able to input radius and Delta angle. I've been trying to find those functions for months now. I found the Line by Bearing command and that works well as long as I don't run into a curve.
How do you draw a curve that's tangent to the previous line with the radius and delta angle? I've been going back to AutoCAD version 12 methods. That is, offset the previous line. draw a circle from the end of the offset. draw a line between the center of the curve and the end of the previous line. Rotate that line with the 12d34'56" format. trim the curve and erase the extra lines.
I've gone through all the curve drawing options in the home menu.I found the CoGo editor in the survey menu but it doesn't draw curves. It just draws a line from the beginning of the curve to the center and continues the traverse from the radius point of the curve. That's obviously either a serious misunderstanding of input or a program bug.
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Jun 23, 2012
I need to reproduce an alignment shown on some plans. I have not had any luck finding a tutorial about how to re-create an existing alignment.
I have a page of plans, it shows the center line going from a back tangent, into a spiral, through a curve, and spiral to tangent. How do I create an alignment from this data?
Spiral Curve
Delta: 1d33'47"
Length: 250.00'
o=0.57'
t=125.00'
Total Curve:
Delta: 24d09'01"
T=10105.34'
L=2,181.34'
o=4582.63'
Main Curve
Delta: 21d01'27"
D=1d15'02"
R=4582.06'
L=1681.34'
Spiral Curve
Delta: 1d33'47"
L=250.00'
o=0.57'
t=125.00'
I am a surveyor and I'm having a hard time understanding the alignment creation tools, in my data collector it is much simpler, you enter the back tangent and the end radius and the length of spiral and whale, but I'm trying to build a corridor, so I can stake the dtm.
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May 3, 2011
I want to create a 3d ployline from a 2d polyline with curves. When I use the convert 2d polyline to 3d polyline command it places a bunch of vertices along the curve so when I go to place elevations on the vertices it takes too long. I want to be able to give an elevation at the pc and pt and have it place elevations along the curve from this info like it does on the stright lines.
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