CobyRupert
Super Member
In many areas, Google maps shows property lines. Switch back and forth between map and satellite view to see where the lines are, if they don't show in satellite view. My corners on Google are within a foot or two of accurate.
This may give you a good idea of where to look for corner pins.
Bruce
In many counties here, the county website has an online tax map (GIS property finder) that you can adjust background map to show Google earth satellite photo with property lines superimposed.