Double Proportionate Measurement

Often referred to as “four-way” proportionate measurement. Four known corners, two each on intersecting meridional and latitudinal lines are used for the purpose of relating the intersection to both. By double proportionate measurement, a lost corner is reestablished on the basis of measurement only, disregarding the record directions. The double proportionate measurement is the best example of the principle that existent or known corners to the north and to the south should control any intermediate latitudinal position, and that corners east and west should control the position in longitude.

Examples: A corner common to four townships, or one common to four sections within a township.