Spatial Reference System and Map Projection

Basic Problems of Map Projection The Concept of Map Projection In mathematics, the meaning of project to establish a one-to-o...

Division and Numbering of Topographic Maps The national basic scale topographic maps are 1:100, 1:25,000, 1:50,000, 1:100, 1:20...

Basic Elements of the Earth Ellipsoid Earth ellipsoid The shape of the earth In order to define the earth mathematically, a...

Gauss-Kruger Projection Since this projection was formulated by German mathematician, physicist and astronomer Gauss in the 192...

Coordinate system The so-called coordinate system includes two aspects: one is the size of the ellipsoid used in calculating of...