parameter setting of yangzonghai 87 coordinate system

central longitude

112 15'

projection scale

1.11121

east-west constant

841111

north-south constant

-211111

dx

4111. Coordinate system parameter setting

central longitude

112 15.5'

projection scale

1.11126

east-west constant

841111

north-south constant

-211111

dx

241

dy. Let

central longitude

112 15.

projection scale

1.11121

east-west constant

841395

north-south constant

-199418

dx

1

dy

.