get a land surveyor to complete a survey for you and go from there. if the "plot" you are referring to is a gps tax map, the lines showing your property line can be wrong, quite wrong at times. a surveyor will get it figured out for you.
Walk the night, travel light, cross the Rio Grande
Someone strums a mandolin, soft gulf breezes blow
My new life is waiting in old Mexico
-Robert Earl Keen