corrected for magnetic declination. The certification note provides information on the surveyor and is the location where recent US plats place the flood survey code in accordance with the National Flood Insurance Act of 1968. The north arrow is familiar to most map readers The title block and lot numbers provide information specific to a development or land use plan An easement is usually indicated by a dashed line, although it is also common to have to look them up in supplementary documents (such as a title report) Streets are usually indicated by a graphical outline of the right of way; the outline also sometimes depicts the paved area. See also Site plan Lot and block survey system Plat of Zion References External links The U.S. National Archives and Records Administration Geography of the United States Land surveying systems Map types