La. R.S. 50:125

In making re-surveys under the provisions of this Part, the surveyor shall, as nearly as possible, re-establish the original lines of any prior survey made under United States or state authority. In all townships or portions of townships where no survey has been made, the surveyor, in surveying or platting the township or portion thereof, shall make it conform as nearly as practicable to the lots and sections indicated upon the plats according to which the lands were granted by the state or by the United States.