The 3D line tool allows you to measure
When Should You Use This Tool
The 3D Line tool provides a simple way to measure the slope of gable roofs and other similar structures from oblique photos in MapBrowser. Use the 3D Area Tool if you want to measure other parts of the roof section.
This tool is not suitable for measuring the pitch of hip roofs, you can use the 3D Area Tool for this.
Roof Pitch Units
Accessing the 3D Line Tool
Zoom into the property you want to measure, then draw a line along the slope you want to measure:
Click Next, and you will see the vertical view of that property. Drag the line to the slope you are measuring:
You will now be able to see the pitch in degrees, and the rise/run ratio, as well as the length.
You might find it helpful to click between the primary view and the secondary view when you are measuring the 3D lines.
Once you are done, you can change to any view, and the 3D line will still be there. In this example, the view is now oblique with South orientation:
- Zoom in as much as possible and take your time for best results
Always draw along the edge of the roof section you want to measure
Switch back to the Primary view to check line placement and orientation if you are not sure
- You can also choose another photo from a different direction from the drop-down list
If you draw the line when not zoomed in, the result is a less accurate measurement:
When zoomed out too far the pitch is 18.3 degrees:
When zoomed in the pitch is 20.6 degrees:
Note: The survey date in the screenshot may differ from the actual capture date of the image, as explained in Survey Date and Photo Time.