What software is used to convert latitude and longitude coordinates into xy coordinates of Xi 'an 80 coordinate system?

Xi 'an 80 coordinate usually refers to the projected Gaussian coordinate defined by Xi 'an 80 coordinate system. Xi 'an 80 is the geodetic coordinate system of IUG 1975 ellipsoid parameters, and the origin of geodetic coordinate is Yongle Town, Jingyang County, Shaanxi Province. There are both latitude and longitude forms and projection plane coordinate forms.

At this time, the geographic coordinates of Xi 'an in the country 1980 are longitude 1 16 00' 00 "latitude 38 33' 30", and the rectangular coordinates of the projection plane are longitude 39438+0838+08385886.

Longitude11600' 48.02191"latitude 38 33' 32.0435".

Extended data:

(1) Xi 'an 80 coordinate system is the reference center coordinate system, the Z axis of the ellipsoid is parallel to the earth's center of mass and points to the earth's origin, and the earth's initial meridian plane is parallel to the meridian plane of Greenwich Observatory; The x axis is perpendicular to the z axis in the initial meridian plane of the earth, pointing to longitude 0; The y axis forms a right-handed coordinate system with the z axis and the x axis;

(2) Ellipsoid parameters are recommended by IUG 1975, so the two most commonly used geometric parameters of Xi 'an 80 ellipsoid are as follows:

Long semi-axis a = a=6378 140 5 (m)

Short axis b = 6356755.2882m.

Flatness α= 1/298.257

Square of the first eccentric heart rate = 0.0066943849959 square of the second eccentric heart rate = 0.00950 18 1947.

Baidu Encyclopedia -Xi 'an 80 Coordinate System