The geographical mile is based upon the length of a meridian of latitude. This included rings for the meridian and ecliptic. Solar noon is the time when the Sun appears to contact the local celestial meridian. Easting values are established as the distance from the central meridian of a zone. The Great Plains west of the 100th meridian are semi-arid. The projection is conformal with a constant scale on the central meridian. Portugal was allotted responsibility over lands east of the Tordesillas meridian. The observatory is noted as the home of the prime meridian and Greenwich mean time. The city's address numbering system begins at the intersection of Washington and Meridian streets. Then measure the angle between them by counting grid lines along that meridian. Pliny referred to a solar meridian, not a sundial. Wilson was born in Meridian, Mississippi. Alabama 369 is served by Meridian, Mississippi. James Earl Chaney was born on May 30th, 1943 in Meridian, Mississippi. Sansone was born in Meridian, Mississippi.