A drawing usually done by the scenic designer of the theatre as if the entire space was cut in half along the center line. May be either looking stage right or stage left, whichever shows the most detail. Required to determine the heights of vertical masking elements and lighting angle of elevation s. See also Center Line Section.
One example:
http://warddesigngroup.us/portfolio/featured/fred_kavli_center/
One example:
http://warddesigngroup.us/portfolio/featured/fred_kavli_center/