Here's looking at you Helen (Auckland) Multi-cache
Just Floundering: Its more than 18 months since anyone has attempted this multi. Its been in place for years and it seems to have run its course. I shall archive it and pick up cache next time passing by.
M
Here's looking at you Helen (Auckland)
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Difficulty:
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Terrain:
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Size: 
(regular)
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Provides an appreciation of Helensville township. Street and pathway walking. Suitable for the whole family. Road, rail and water hazards nearby so watch the kids.
The co-ordinates are of a convenient carpark in the centre of Helensville. All location points including GZ are within 800 metres of this carpark. Toilets available at carpark.
Determine the co-ordinates where the photographer stood at each of the points depicted by pictures 1 to 5. Allocate the letters ab cd.efg to each of the latitude co-ordinates and hij kl.mno to each of the longitude co-ordinates. Then determine the distance (in metres) from each pictured point to the cache by completing the following equations:-
For picture 1 the equation is: (l-k) x ((l-k) x ed)+f+hc
For picture 2 the equation is: ((le) x (a+l)) + b
For picture 3 the equation is: ((hij) x (e+h)) - ((e x m) x (hd)) - (l +m)
For picture 4 the equation is: ((k+l) x (en)) - ((hij) + (e x k))
For picture 5 the equation is: (((ml) + j) x e) + (fm) + (fd)
Having determined the distances to the cache from any two or more of the pictured point co-ordinates you should be able to plot on a map the location of the cache. Good luck.
The cache is a 1.5 litre plastic screwtop container in camo colours. Initial contents are log book and pencil plus a range of the usual small swaps.
Additional Hints
(Decrypt)
Haqre sbbgoevqtr bire gvqny perrx ba jnyxjnl.