The posted coordinates will take you to a mural in Havre de Grace where your powers of observation will help you get the necessary information to determine the coordinates for the cache, which is within walking distance of the mural.
The coordinates for the cache are N 39 RS.TUV W 076 0W.XYZ, where
A = the number of lines of text in the poem
B = the number of fish that are to the left of the crab
C = the number of sailboats that are in the water
D = the number of boats that are out of the water minus 1
E = the number of dormers on the red house with a balcony
F = the number of four wheeled vehicles minus the number of two wheeled vehicles
G = the number of dogs that are being walked
H = the number of letters in the name of the business that has an awning
I = the number of vowels in the artist’s full name plus 1
and
R = A – (F*3)
S = B – (G*2)
T = C + (D/E)
U = D * (H-B)
V = E – (C/E)
W = F * I
X = G * (A/B)
Y = H + G
Z = I + (A/2)
Checksum 1: C + D + F + H = 23
Checksum 2: S + V + X + Z = 13
08/23/19: Because the cache has gone missing so many times, I've moved it. The new final is -.026 North and +.021 West from the old final location.