How observant are you?

Take a wander along High Street and check out the architecture.
South 36° 07._ _ _

Checksum: The sum of the absolute values is ???1
East 144° 44._ _ _

Checksum: The sum of the absolute values is ???8
Work out the numbers and you'll end up at GZ.
There's a small or, possibly, large prize for the First To Find.