Cache is located at S 33 50.AB0 E 148 40.CD1
Missing co ordinates can be found by answering questions about the artwork below.

A= First name of artist. Number of letters.
B= First word in title of artwork. Number of letters. Add 4
C= Second word in title. Number of letters. Add 3
D= Fourth word in title. Number of letters. Subtract 1
S= 26 E = 32