What is the central meridian of Meishan city?

103 o50' The central meridian is also called "central meridian". The central meridian of Meishan is 103 o50'', the ellipsoid parameter is the reference ellipsoid of Xi 'an coordinate system 1980, the projection plane is the average elevation plane of the survey area of 4 10m, and height system is the international height system of 1985, which fully meets the specifications and technical requirements of the second national land survey. The central meridian is a meridian on the earth and is defined as a line with a longitude of 0 degrees.