Dealing With Reverse Shots

Dealing With Reversed Shots

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Dealing With Reversed Shots. Several problems can occur as you are entering reversed shots. The Editor has special features that help you enter and manipulate reversed shots. For example, it is fairly common for surveyors to try to turn a reversed shot into a normal shot by reversing the station name order and measurement values as they are entered. The practice is dangerous because it is easy for the surveyor to get distracted and forget to reverse everything as it is entered. For this reason, the editor allows you to fix these kinds of problems with just a mouse click or keystroke. Here are the commands that make the changes:

 

Swap Stations Names - F6. This command is executed by clicking on the Swap Station button on The Tool Bar or by hitting F6 on the keyboard.

 

SwapBtn

 

This command copies the 'From' station name into the 'To' station name and the 'To station name into the 'From'. This command is very useful with the automatic station name sequencing. The automatic sequencing tries to anticipate the next station name by incrementing the last station name that was used. Automatic sequencing assumes that shots will be foresights. With the command, you can convert the station names chosen by the automatic sequencing into backsights.

 

Automatic station name sequencing chooses the next pair of station names based on the current pair. Normally, it uses the 'To' station of the current shot as 'From' station for the next shot. If the current shot is a backsight, the next pair of stations will be incorrect. For example, if the current shot ran from A7 to A6, the automatic sequencing would chose A6 to A7 as the next pair. Obviously, the next pair should be A7 to A8. To solve this problem, the editor keeps track of shots where the station names have been reversed. When the station names have been reversed, automatic sequencing uses the 'From' station of the current shot as the 'From' station of the next shot.

 

Flip Azimuth - F7. This command is executed by clicking on the "Flip Azimuth" Button on The Tool Bar or hitting F7 on the keyboard.

 

FlipAzmBtn

 

This command reverses the azimuth so that the value is 180 degrees away from the original. For example, if current azimuth is 10 degrees, the new value will be 190 degrees. This command is useful where the compass angle doesn’t match the order the station names were entered. This can happen when the surveyor reverses the azimuth he entered without reversing the station order.

 

Flip Inclination - F8. This command is executed by clicking on the "Flip Inclination" Button on The Tool Bar or hitting F8 on the keyboard.

 

FlipIncBtn

 

This command reverses the inclination value so that if the original value was positive, the new value will be negative and vice versa. For example, if the current value is +10 degrees, the new value will be -10 degrees. This command is useful where the inclination angle doesn’t match the order that the station names were entered. This can happen if the surveyor reverses the inclination as it is entered without reversing the station order.

 

Flip Back Azimuth - Shift-F7. This command is executed by clicking on the "Flip Back Azimuth" Button on The Tool Bar or hitting Shift-F7 on the keyboard.

 

SwapBackAzmBtn

 

This command reverses the back azimuth so that the value is 180 degrees away from the original. For example, if the current azimuth is 10 degrees, the new value will be 190 degrees. This command is useful where the compass angle doesn’t match the order the station names were entered. This can happen when the surveyor reverses the azimuth he/she entered without reversing the station order.

 

Flip Back Inclination - Shift-F8. This command is executed by clicking on the "Flip Back Inclination" Button on The Tool Bar or hitting Shift-F8 on the keyboard.

 

SwapBackIncBtn

 

This command reverses the inclination value so that if the original value was positive, the new value will be negative and vice versa. For example, if the current value is +10 degrees, the new value will be -10 degrees. This command is useful where the inclination angle doesn’t match the order that the station names were entered. This can happen if the surveyor reverses the inclination as it is entered without reversing the station order.