A doctrine that allows adjoining landowners to agree regarding the location of the true boundary line between themselves,if the line is in doubt.An oral agreement as to the location of the true boundary line is usually enforceable, despite statute of frauds laws that require all contracts relative to real estate to be in writing. In contrast, an oral agreement to compromise a boundary line,perhaps to “split the difference”and establish it someplace in the middle between two conflicting opinions,must be in writing to be enforceable.