The gentle rolling landscape of Louisiana is a result of years of clays and silt being deposited by the Mississippi River. Remarkable Lake Pontchartrain is the largest estuary in southern Louisiana. Elevations are represented by color, and this, in combination with our relief shading technique, gives the map a 3-dimensional look. 41 inch by 45 inch in size. 1:500,000 Scale. Available as a poster ready for hanging or framing, and as a laminated poster. Information concerning ordering by by fax, or phone! Gift Wrap is not available. Shipped directly from the manufacturer. Product Number RA-LAL01