Compass Polyline Adjustment

This command applies a compass adjustment to a perimeter defined by a polyline. After selecting the polyline, the program displays arrows to show the polyline direction and you have an option to reverse the polyline. The command draws a new polyline of the adjusted perimeter and creates a report. The closure error is the difference between the end point of the polyline and the specified closing point that the program prompts for. In the dialog, you can set the Traverse Type as Open or Closed. For a closed loop adjustment, the closing point is the starting point of the polyline. For an open traverse, the program will prompt for the closing point.

For the Geodetic Report option, the program reports the geodetic distances and angles. To use this option, the grid projection must be define in Settings > Drawing Setup.

Here is an example report for a closed loop.

Compass Polyline Adjustment

Closure Results
Starting Point   : N 4854.766 E 5357.221
Ending Point     : N 4854.636 E 5357.533
New Point        : N 4854.766 E 5357.221
Azimuth Of Error : N 67°22'29" W
North Error      : 0.130
East Error       : -0.312
Distance Error   : 0.338
Distance Traverse: 1029.503
Closure Precision: 1 in 3050

Original Data
From         To           Angle          Distance 
4            5            S 13°01'45" E  392.218  
5            11           N 44°23'59" E  296.297  
11                        N 60°02'20" W  340.987  

Adjusted Point Comparison
             Original                Adjusted
Point#       Northing    Easting     Northing    Easting     Dist   Angle
4            4854.766    5357.221    4854.766    5357.221    0.000  N 90°00'00" E
5            4472.645    5445.645    4472.695    5445.526    0.129  N 67°22'29" W
11           4684.343    5652.952    4684.430    5652.744    0.226  N 67°22'29" W
             4854.636    5357.533    4854.766    5357.221    0.338  N 67°22'29" W

Adjusted Data
From         To           Angle          Distance 
4            5            S 13°00'50" E  392.143  
5            11           N 44°22'56" E  296.261  
11                        N 60°02'29" W  341.098 

Prompts

Pick polyline for Compass Adjustment: pick polyline
Reverse polyline [Yes/<No>]? press Enter
Pick new closing point: pick point

Pulldown Menu Location: Survey > Polyline Tools
Keyboard Command: compassadj
Prerequisite: A polyline