Contours and isovolumes can be added to sub-zone regions as well as main zone regions. This allows for easier viewing of results for congested regions where sub-zones are more applicable.
To add a contour for a sub-zone region:
Click the Add Item tab and select Contour from the dropdown menu.
Leave the Name of the contour as its automatically defined one
Select Fire Zone: Main Fire Zone as the Zone
Click the blue Add Sub-Zone text to the right of the Zone dropdown menu as shown in Figure 25.
In the Sub-Zone dropdown menu that appears, select Sub-Zone 01
Ensure the On Plane option is set to the XY plane
Set the height of the plane to have an Offset at "0.75 meters"
Set the System as Zone. This sets the offset value to be from the base of the sub-zone rather than based on the global origin height of z=0
Leave the Coverage options as 0 to 4
Click the Preview checkbox to view the contour.
Contours can be previewed in different zone or sub-zones before being added to the project. Continue by changing the Sub-Zone dropdown menu to select Sub-Zone 03
The preivew of the contour will automatically move to Sub-Zone 03 as in Figure 27 below
Select the Add Item button to add the sub-zone contour to the project. This will turn the contour slightly transparent, which can be changed in the Opacity section of its properties panel.
Before continuing to the next section, turn off the visibility of the contour by deselecting the checkbox next to its name under the Fire Mapping-> Contours heading in the Project Items Tree.