Posted 4/23/2010 22:14 (#1171858 - in reply to #1171448) Subject: A compass will work really well
West KY, Miss River County
Establish your base line, parallel to the edge as suggested above. Then find the point you want to start and use the compass to to shoot a perpendicular. The compass on an iPhone might work, but probably not as well as a Boy Scout Silva.
90 degree line in field
