Convert from chain [Gunter, survey] to braza [Texas]

Unit Definition (chain [Gunter, survey])
The chain is a unit of distance formerly used by surveyors. The traditional British surveyor's chain, also called Gunter's chain because it was introduced by the English mathematician Edmund Gunter (1581-1626) in 1620, is 4 rods long: that's equal to exactly 1/80 mile, 1/10 furlong, 22 yards, or 66 feet (20.1168 meters). The traditional length of a cricket pitch is 1 chain. Gunter's chain has the useful property that an acre is exactly 10 square chains. The chain was divided into 100 links. American surveyors sometimes used a longer chain of 100 feet, known as the engineer's chain or Ramsden's chain. (However, Gunter's chain is also used in the U.S.; in fact, it is an important unit in the Public Lands Survey System.) In Texas, the vara chain of 2 varas (55.556 ft) was used in surveying Spanish land grants. In the metric world, surveyors often use a chain of 20 meters (65.617 ft).

Unit Definition (braza [Texas])
The Braza is a traditional unit of distance in Spain and Latin America. In Spain it equals 2 varas, 8 palmos, or about 1.67 meters (5.48 feet or 65.75 inches). In Latin America the Braza tends to be larger. The Argentine Braza is 1.73 meters (5.68 feet or 68.16 inches), and under the Texas definition of the Vara the Braza would be 1.693 meters (5.556 feet or 66.67 inches). The Portuguese Braça is similar, but it equals 10 palmos or about 2.20 meters (7.22 feet or 86.6 inches).