3Com Wireless LAN Controller WX2200 - Manual (Page 129)

Define Site Information 129
Set the Scale Set the scale on your floor plan to better define the distance between
objects in your network.
To set the scale
1 Display the floor plan in the Content panel.
2 Click on the toolbar.
a Draw a line on the floor plan over an object whose length you know;
for example, a 3-foot door.
b Enter the actual length of the object in the pop-up box.
c Click OK.
You may want to zoom in the object to be used to define the scale to
make this task easier.