andrew027: Only slightly off topic, but related...
I remember reading a post on GZ that had a link to a map showing the locations of exchanges and cabinets in New Zealand. I tried looking for it but can only find a really old thread that points to the old telecomwholesale website, and I can't find a comparible map on the sparkwholesale site. Does anyone have a link for a current map?
This map shows most of the cabinets:
http://gis.geek.nz/infrastructure.html
Exchanges are harder but you can try:
https://koordinates.com/publisher/BroadbandMap/sets/
Just look for fibre running into a building near the centre of the 20mbps/VDSL zone, and then you can check by looking up the building description also.
Probably the easiest way to get your actual cable length is to ask Chorus.