Use the deflection distance (DD) command to quickly create a point using a deflection angle and distance from an established line.
The term deflection angle refers to the angular direction turned from the extension of the previous course. Additionally, you can also use a vertical angle or vertical distance to locate the point.
To create an observation using deflection angle and distance, using the command language
- In Toolspace, on the Survey tab, right-click the network that you want to add points to, and click Survey Command Window.
- At the Command line, enter:
DD (point) [angle] [distance] (description)
To create an observation using deflection angle, distance, and vertical angle, using the command language
- In Toolspace, on the Survey tab, right-click the network that you want to add points to, and click Survey Command Window.
- At the Command line, enter:
DD VA (point) [angle] [distance] [vertical angle] (description)
To create an observation using deflection angle, distance, and vertical distance, using the command language
- In Toolspace, on the Survey tab, right-click the network that you want to add points to, and click Survey Command Window.
- At the Command line, enter:
DD VD (point) [angle] [distance] [vertical distance] (description)
Examples
The following example illustrates using the deflection distance command.
NE 1 100 100
STN 1
AZ 1 2 100
BS 2
DD 3 85.2657 60.960
! AZIMUTH: 385.2657 DISTANCE: 60.9600
! POINT 3 NORTH: 159.3345 EAST: 86.0167
! ELEV: <Null>
Points created using the DD command:
Point 3 is located by turning a deflected angle of 85.2657 right from the extension of the backsight line at a distance of 200. Angles and distances are in the current units, unless you type a qualifying suffix.
Command Syntax
DD (point) [angle] [distance] (description)
or
DD VA (point) [angle] [distance] [vertical angle] (description)
or
DD VD (point) [angle] [distance] [vertical distance] (description)
| Parameter | Definition |
|---|---|
| point | The point identifier of the new point. You do not need to assign a point number if auto point numbering is on. |
| angle | The deflection angle as measured to the point. Type this value in the current angular units (DMS, grads, decimal degrees, radians, or mils). |
| distance | The distance from the instrument point to the point being located. It is measured in the current units unless otherwise specified. The distance is assumed to be a horizontal distance unless VA is used. When VA is used, the distance is recognized as a slope distance. |
| vertical angle | The direction of the vertical angle (zenith, horizontal, or nadir). Type this value in the current angular units (DMS, grads, decimal degrees, mils, or radians). |
| vertical distance | The elevation difference from the instrument to the prism. If the prism is higher than the instrument, then this is a positive value. |
| description | An optional description associated with the point. |