The coordinates for the cache are N 39 RS.TUV W 076 0W.XYZ, where
A = the number of birds on the right side of the mural
B = the number of flags, including the background
C = the number of the racehorse in blue plus the number of the racehorse in red
D = the number of cannons
E = the number of individual years painted on the mural
F = of those years, the most recent year minus the second most recent year
G = the artist’s daughter’s name is hidden amongst the Black-Eyed Susan’s – the number of letters in her name (if you can't find this on the mural, you can use a search engine)
H = the number of Black-Eyed Susan eyes divided by 2
I = the number of vowels in the artist’s name
and
R = A / (I - D)
S = B – (G / E)
T = C * (A – I)
U = D + B
V = E + (B – 2)
W = F * (H - E)
X = G – F
Y = H / (C / D)
Z = I – (E – A)
Checksum 1: B + E + F + G + H = 27
Checksum 2: R + T + Y + Z = 8
Update 08/15/20: To make this cache easier to access, I've moved it slightly. Add .002 to the North coordinates and subtract .006 from the West coordinates.