The map designating areas in the city subject to flooding shall be the official Flood Insurance Rate Map (FIRM) provided to the city by the Federal Emergency Management Agency (FEMA) dated April 2, 2002, as amended, and is hereby incorporated by reference. The map delineates those areas determined to be subject to flooding based upon evidence of past flood events, and elevation data pertinent to the one hundred year flood, or that which has a one percent chance of occurrence in any one year. Based on evaluation of this map, the city shall seek to eliminate or reduce flood losses by regulating building construction and land use within the flood plain hazard areas identified thereon. (Amended during the March 2009 supplement.)