AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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jonathan_ckf
Posts: 4
Registered: ‎08-31-2012
Message 1 of 10 (1,633 Views)

Boundary Survey - Bearing Problem

1633 Views, 9 Replies
08-31-2012 08:41 PM

Hi,

 

I am new to survey and Civil 3D. I got an old boundary survey which is about 30 years ago. They lost the softcopy. So I am asked to trace it over again in a .dwg format.

 

I am facing a problem when i key in a bearing - 137d58'30" and 135.78meter , I key in @135.78<137d58'30" but it came out N42d01'30"W and the distance is right - 135.78. According to some replies from other forum, a bearing can't be more than 90d? (please see the attachment, the left is screenshot of result N42d01'30"W, the right one is the old survey)

Anyone know how to set the bearing without directions N,E,S,W? and is the N42d01'30"W is same value as 137d58'30"?

 

Btw, I think Civil 3D is the right choice to draw it? But I am not very sure about this as I am new to this. Any other Autocad software? Please suggest.



Jonathan.

Distinguished Contributor
bingeomatics
Posts: 216
Registered: ‎04-29-2012
Message 2 of 10 (1,623 Views)

Re: Boundary Survey - Bearing Problem

08-31-2012 10:04 PM in reply to: jonathan_ckf

Hi,

I think in your work have not any problem. Because, the both angle are same direction....

Binnat Khalilov
Member
jonathan_ckf
Posts: 4
Registered: ‎08-31-2012
Message 3 of 10 (1,620 Views)

Re: Boundary Survey - Bearing Problem

08-31-2012 10:12 PM in reply to: bingeomatics

Hi Binnat,

Do you mean the value is actually same? how do u get from 137d58'30" to a bearing with directions - N42d01'30"W? Can you please explain more on this?

 

But I hope I cant draw without directions, meaning I would like it to be remained like 137d58'30". Any idea about this?

 

Jon.

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Joe-Bouza
Posts: 4,884
Registered: ‎12-15-2008
Message 4 of 10 (1,600 Views)

Re: Boundary Survey - Bearing Problem

09-01-2012 04:54 AM in reply to: jonathan_ckf

Is your north arrow pointing straight up? When you key in bearing I suggest using the civil3d draw palette>> line>> by direction.

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
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Note: Its all Resistentialism, so keep calm and carry on

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wfberry
Posts: 1,842
Registered: ‎09-05-2006
Message 5 of 10 (1,597 Views)

Re: Boundary Survey - Bearing Problem

09-01-2012 05:42 AM in reply to: jonathan_ckf

If you are using Civil 3D, the first thing you need to do is the INCLUDED Tutorials with the program.  Upper right of your screen is the help dropdown with Tutorials listed.   Do each session until you understand how to enter Bearings and Distances.

 

Bill

 

 

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Jeff_M
Posts: 4,317
Registered: ‎07-22-2003
Message 6 of 10 (1,594 Views)

Re: Boundary Survey - Bearing Problem

09-01-2012 06:41 AM in reply to: jonathan_ckf

Looks like everyone else is a bit slow this Saturday morning. Your map is labeled in Azimuths, not Bearings. Change the drawing's setting to use Azimuths. This will mean you will need to change all of the line & curve label styles to also use Azimuths. I think that some of the Country Kits have templates setup this way already (SA- South Africa, and AUstralia are possible).

Jeff_M, also a frequent Swamper
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tcorey
Posts: 2,557
Registered: ‎12-18-2002
Message 7 of 10 (1,511 Views)

Re: Boundary Survey - Bearing Problem

09-04-2012 11:25 AM in reply to: jonathan_ckf

Hello Jonathan,

 

Your error is in the fact that you are inputing a line using AutoCAD input. You should be using Civil 3D input.

 

Start the AutoCAD line command and then type 'BD (for Bearing input) or 'AD (for Azimuth input.) These are Civil 3D Transparent Commands that let you use regular AutoCAD commands, but allow input in a survey format.

 

FYI: Your results were correct. AutoCAD starts at angle 0 pointing east. If you input @135.78<137d58'30, that tells AutoCAD to turn 137 degrees left, which is northwest. Using the transparent commands will assume 0 is North and input of 137 degrees will go right, giving you a southeast direction.

 

Best regards,

 

Tim

Tim Corey, Owner
Delta Engineering Systems
Redding, CA
Autodesk Authorized Value-Added Reseller
Member
jonathan_ckf
Posts: 4
Registered: ‎08-31-2012
Message 8 of 10 (1,481 Views)

Re: Boundary Survey - Bearing Problem

09-06-2012 04:39 AM in reply to: tcorey

Thank you Guys!

 

Thanks for all d info provided.

 

Btw, please see attachment, any way to do the "bullets"(pointed by red arrows) on each of the points of every lines? I don't know what it call but i think there is a right way to annotate this? and the texts (pointed by blue arrow), or it is just Multiline Text?

 

regards,

Jon.

 

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AllenJessup
Posts: 5,872
Registered: ‎05-21-2003
Message 9 of 10 (1,473 Views)

Re: Boundary Survey - Bearing Problem

09-06-2012 06:21 AM in reply to: jonathan_ckf

There are many ways of doing this from drawing individual circles or donuts to using Civil 3D point styles. My choice would be to set Cogo Points at each of those points and then create a Point Style.

 

You could use a Custom Marker to create an open circle and an Autocad block to create the closed circle. The block could be a donut with a small or zero inside radius.

 

pm.PNG

 

Allen

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AllenJessup
Posts: 5,872
Registered: ‎05-21-2003
Message 10 of 10 (1,468 Views)

Re: Boundary Survey - Bearing Problem

09-06-2012 06:51 AM in reply to: jonathan_ckf

jonathan_ckf wrote:

 is the N42d01'30"W is same value as 137d58'30"?

 



You've gotten most of your answers already. You now know that the map you're working from is in Azimuths and that you should use the Civil 3D to draw your boundary line.

 

N42°01'30"W is almost the same value as 137°58'30". What you need to understand is that with bearings you will always have a reverse bearing. Being a line, what controls which quadrant the bearing is in is where you start. If you start at one end the bearing will be N42°01'30"W. If you start at the other end the bearing will be S42°01'30"E and an Azimuth of 137°58'30" is the same as S42°01'30"E. If you reversed your N42°01'30"W label it would be S42°01'30"E.

 

I believe that you started at North and turned 137°58'30" to the right. If you turned 137°58'30" left from due east you would get 137°58'30" - 90° = 47°58'30". Whish is  N47°58'30"W.

 

I'd suggest finding an old Surveying text book on line and studying the section that discussed Azimuths, Bearings and Quadrants.

 

Allen

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