Normally the two sets of corners along a standard parallel; the standard township, section, and quarter-section corners placed at regular intervals of measurement; additionally, the closing corners established on the line at the points of intersection of the guide meridians, range and section lines of the surveys brought in from the south. In other cases, not fully in conformity with the rectangular plan, two corners, each common to two townships only, instead of one corner of the four townships. Similarly, two corners, each common to two sections; and two quarter-section corners, each referring to one section only.
The term Double Corner is sometimes used incorrectly to denote two lines established on the ground although the field-note record indicates only one line, thus creating a hiatus or overlap.
Thoughts