Every such ordinance, after being introduced and having passed a first reading, shall be referred to the officer or board in the municipality charged with the duty of making assessments for benefits for local improvements, who, or a majority of whom, shall thereupon cause a map of such improvement to be made by the municipal engineer or surveyor, showing the real estate and improvements to be taken therefor, and the property which, in the judgment of the assessing officer or board, will be specially benefited thereby, designating each lot and parcel on the map by a letter or number.
N.J.S. § 40:49-14