PPI used to have a fantastic book with all the programs you'd need, including checksums to make sure you didn't fat-finger somewhere along the way.

Thank you all for the wisdom. Found srplm's point particularly interesting. May use "parallel with the brick face of a building" or something similar.

In my case, it was a ditch, but yes. Both parties agreed that the centerline of the ditch was the property line (owners were farming the ground to the...