Use information found on the plaque at the posted coordinates to get the final coords.
N43 36.ABC W92 25.XYZ
A - The number of lines of text between the 2 horizonal lines.
B - Add the first and last digits in the first year listed.
C - The number of letters in GMH's place of death -1.
X - The number of arrows +1.
Y - The last digit on the plaque.
Z - The number of men recognized here.