Just for info - for added depth to your research try...
 

looking at videos on You Tube. (I'm not trying to promote them or anything!) I've done loads of the open2view, trademe etc etc and you get a good aerial layout but there are some cracking videos on the Tube that show the layout of the land in a more understandable fashion.

I found stuff on Whitby, Paremata, Porirua, Johnsonville, lots on the city and most other areas around Wellington. Guess there must be lots of stuff on other areas round NZ.

Anyway...have a squiz if you fancy it!

sb