AutoCAD Map 3D General Discussion

AutoCAD Map 3D General Discussion

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Active Member
christinemayeux2241
Posts: 7
Registered: ‎05-14-2008
Message 1 of 5 (2,094 Views)

Azimuth, angles and direction

2094 Views, 4 Replies
04-29-2010 12:19 PM
I'm having a problem understanding the relationship between several settings related to angles.

I have my environment set such that North is the 0 angle and the direction is clockwise.

When I begin to draw a line with polar tracking on, after I click the first point, the polar tracking box shows the length of the line and the angle from North based on where my cursor is. So I might see Polar: 4.5 < 30(degree symbol) when I have a line is 30 degrees off of north. The box that would allow me to enter a distance (or line length) also displays 4.5, but the box that would allow me to enter an angle displays 60(degree symbol).


My first question is can I get that box that contains the angle to display the azimuth instead and allow me to enter the azimuth, not the angle (which appears to be from the east line!).

When I use the mapcogo dialog box, to create a point based on Azimuth and Distance, after selecting a point, when I enter an Azimuth, say 35,(an angle off of North), and hit tab, the dialog box changes it to 145, then if I enter a distance and hit calculate, the resulting point is northwest of my starting point at an azimuth of 360 - 35 or 325. At least I think that's the result, I never actually see a point to determine what the actual Angle is.

What's going on? I'd like to be able to represent all angles as azimuths from North. Is that possible? Why does the entry in the mapcogo dialog box change?

I'd send screenshots, but the boxes don't get captured when I try to do that.

Can someone explain to me what's happening?
*Expert Elite*
AllenJessup
Posts: 5,993
Registered: ‎05-21-2003
Message 2 of 5 (2,094 Views)

Re: Azimuth, angles and direction

04-29-2010 12:44 PM in reply to: christinemayeux2241
My guess would be that Map is like Civil or LandDesktop where you have to leave the units at Decimal and Deg,Min.Sec. I don't use the Map portion of Civil 3D extensively so I'm not sure that you mean by setting the environment.
In AutoCAD 0° is to the right in a view in world coordinates and no viewtwist. IOW the X direction. Civil, LDT and (I presume) Map make adjustments to your input to allow for this. If you change settings you can fool the software in to making corrections based on an incorrect 0°.
Allen
*Murph
Message 3 of 5 (2,094 Views)

Re: Azimuth, angles and direction

04-29-2010 02:47 PM in reply to: christinemayeux2241
Check the settings under the drafting settings for dyn input and the polar
settings. There's absolute/relative and polar/cartesian settings for it.
If you want true azimuths use the cogo tools and transparent command.

--

Murph
http://map3d.wordpress.com/


"christinemayeux2241" wrote in message
news:6383087@discussion.autodesk.com...
I'm having a problem understanding the relationship between several settings
related to angles.

I have my environment set such that North is the 0 angle and the direction
is clockwise.

When I begin to draw a line with polar tracking on, after I click the first
point, the polar tracking box shows the length of the line and the angle
from North based on where my cursor is. So I might see Polar: 4.5 <
30(degree symbol) when I have a line is 30 degrees off of north. The box
that would allow me to enter a distance (or line length) also displays 4.5,
but the box that would allow me to enter an angle displays 60(degree
symbol).


My first question is can I get that box that contains the angle to display
the azimuth instead and allow me to enter the azimuth, not the angle (which
appears to be from the east line!).

When I use the mapcogo dialog box, to create a point based on Azimuth and
Distance, after selecting a point, when I enter an Azimuth, say 35,(an angle
off of North), and hit tab, the dialog box changes it to 145, then if I
enter a distance and hit calculate, the resulting point is northwest of my
starting point at an azimuth of 360 - 35 or 325. At least I think that's
the result, I never actually see a point to determine what the actual Angle
is.

What's going on? I'd like to be able to represent all angles as azimuths
from North. Is that possible? Why does the entry in the mapcogo dialog box
change?

I'd send screenshots, but the boxes don't get captured when I try to do
that.

Can someone explain to me what's happening?
Active Member
christinemayeux2241
Posts: 7
Registered: ‎05-14-2008
Message 4 of 5 (2,094 Views)

Re: Azimuth, angles and direction

04-29-2010 02:55 PM in reply to: christinemayeux2241
I found those settings.

For Dynamic Input/ Pointer InputI have:

Cartesian and Absolute

For Polar Tracking, for Polar Angle I have Absolute

When you say

If you want true azimuths use the cogo tools and transparent command

What do you mean?
*Murph
Message 5 of 5 (2,094 Views)

Re: Azimuth, angles and direction

04-29-2010 03:05 PM in reply to: christinemayeux2241
Type cogo in the help search and read up on them,
Different interface on using them depending on your release of Map3D.

--

Murph
http://map3d.wordpress.com/


"christinemayeux2241" wrote in message
news:6383260@discussion.autodesk.com...
I found those settings.

For Dynamic Input/ Pointer InputI have:

Cartesian and Absolute

For Polar Tracking, for Polar Angle I have Absolute

When you say

If you want true azimuths use the cogo tools and transparent
command

What do you mean?
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