The posted coordinates take you to the general area of the Canterbury Earthquake National Memorial.
At the posted coordinates
E = The number of letters in the 2nd word of the first line of the text on the outside of the stone wall as you head down towards the river.
Now head down to the main part of the memorial.
Somewhere there, as part of a memorial there is a four line quote, which includes a 4 digit number. Locate this quote, find the 4 digit number, which I will call ABCD. There are seats nearby where you can reflect, and calculate the final where
U = E - C
V = C + D
W = A + B
X = (Number of words on the second line of the quote) x 2
Y = A + D
Z = B - A
Checksum of U+V+W+X+Y+Z is 33 Final is at S43 32.UVW E172 37.XYZ
Natural disasters and memorials for natural disasters affect everybody differently. If you feel that you would prefer not to walk past the main memorial area because it would be too upsetting, or whatever reason, then please contact me, and I will give you a more specific area to get the required information, without needing to see the names of the earthquake victims. The cache is not located within the earthquake memorial area.