With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfBridgeSpacing
Cisco DOT11 Interfaces Bridge Spacing
1.3.6.1.4.1.9.9.272.1.1.1.1.1.6
If this device is a root wireless bridge, this value is the distance in kilometers reported between this device and its farthest non-root bridge client.
Back to CISCO-DOT11-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cd11IfBridgeSpacing on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.