How to Find the Slope of a Line in Azimuths in AutoCAD

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An azimuth is a bearing angle relative to a cardinal direction, usually north or south. A diagonal line has a slope, which can be described using the degree angle of the azimuth bearing. All versions of Autodesk's AutoCAD, a computer-aided design (CAD) application, provide tools to find azimuths and describe the slope of azimuths with angular dimensions, such as degrees, radians or degrees, minutes and seconds.

  • Open AutoCAD. Select "Open" in the "File" menu, select your file and click the "Open" button.

  • Pan and zoom to the diagonal line to determine the slope.

  • Type "Units" in the command line. Select the "Angle Type," choosing between "Decimal Degrees," "Deg/Min/Sec," "Radians," "Grads" or "Surveyor's Units." Most people prefer to use "Decimal Degrees" to find slope.

  • Select the "Base Angle Direction." The base angle is the cardinal direction to determine bearing. It defaults to "East," but you can select "North," "South," "West" or an arbitrary direction, as well.

  • Click the "OK" button.

  • Type "Line" in the command line and click your mouse at the endpoint or midpoint of your sloping line. Type "@100<0" where "@" provides a position relative to the first point clicked, "100" is the distance of the line, "<" represents an angular dimension and "0" is the degree angle. Press "Enter" or "Return" on the keyboard; a line going along the chosen "Base Angle Direction" will appear.

  • Type "Dimangular" in the command line to draw an angular dimension annotation. Select the drawn line and the sloped line. Place and click the dimension annotation between the two lines; the dimension annotation gives the azimuth bearing relative to the sloped line and the "Base Angle Direction."

References

  • "Architectural Graphic Standards"; American Institute of Architects; 2007
  • Photo Credit Comstock Images/Comstock/Getty Images
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