Doc boundary riders are 'walking the wire'

An estimated 22,000km of fences is to be inspected nationwide  (in New Zealand)
Their mission is to survey every DOC owned fence, estimated to involve 935km of 
walking in the Nelson and Marlborough regions alone, and enter 
the exact locations into a global positioning system. 

http://www.stuff.co.nz/stuff/0,2106,2747093a7693,00.html