Xi 'an coordinate system turns to latitude and longitude.

Data analysis shows that the X axis has 7 digits, the number is Y, except for the last 6 digits of the code, the band number is 42, which is divided into 3 degrees. The longitude of the central meridian of the projection belt is 126 degrees. Conversion result: First, 80 coordinate system: north latitude: 45:25:04.84958N east longitude: 127:06:27.66400E This point is in Yuquan Town, Acheng District, Harbin.