Scale Bars

For instruments that measure both angles and distances, it is not necessary to use scale-bars. However the can be helpful in many scenarios and are required for network alignments when working with theodolite and photogrammetry networks. Without them, the instruments could scale freely within the alignment process.

After measuring the necessary points, the user should create a scale bar when working with these instruments.

 

Add Scale Bar

A scale bar is defined by two know points, a length value, and a tolerance:

To do this you will need to utilize two points that have a known distance from each other. They can be two points designated only for the scale or common points, but either way they need to be recorded from the theodolite before the scale bar is created.

 

Add Scale Bar by Selecting 2 Points

Once you have the actual distance select Add Scale Bar by Selecting 2 Points. At this point, select the two points that you just measured the distance between. The window below will appear. Select edit to change the length to the actual measured amount. After hitting OK the new length should populate. You should also notice that a scale bar is now listed in the tree bar.

 

Scale Bar Type List

The defined scale bar parameters are saved within the Scale-Bar Type List allowing quick construction of additional scale bars based upon them.

 

Scale Bar Measurements

The currently defined list of scale bars in a job file can be accessed through the Scale Bar Measurements option. It will bring up a display like the following: