Calculating the Scale of an Image

If there is no scale present, you can use the Calculate Scale feature to determine the correct scale, based on a known linear object.

WARNING: Changing the scale of a page after performing takeoff is not recommended as On-Screen Takeoff may not be able to resize all takeoff correctly. Some takeoff may no longer be visible on the page and or resized incorrectly.

NOTE: It is best to use the longest known linear on a project plan possible to calculate the most accurate scale.

1. Zoom into the linear object you will be using to set the scale

    

   

    

2. Click Edit > Calculate Scale - The Calculate Scale dialog appears

    

   

    

3. Select a Scale Style (Architectural, Civil or Metric)
4. Enter the length of the known linear object, as displayed on the image 

    

   

    

   NOTE:   For Imperial measurements, the quantity is entered in feet and inches   For 25' you will enter 2500, which is 25 feet, 00 inches For 100' 6" you will enter 10006, which is 100 feet, 06 inches   For Metric measurements, the quantity is entered in millimeters   for 1 meter you will enter 1000 for 25 meters you will enter 25000

    

5. With the Calculate Scale window open, click the start, and then the end point of the known linear

    

   

    

6. You will notice the scale automatically adjusts in the Calculate Scale window

    

   

    

7. Click OK to accept the new scale

Verifying the Scale of an Image