1. Map projection
1. Definition of map projection
Map projection is a theory and method that uses certain mathematical laws to transform the longitude and latitude lines of the earth's surface to a plane.
2. Classification of map projection
(1) According to the nature of deformation
•
Isometric projection:
The angle between two differential line segments on the projection surface is
equal to the angle between the corresponding two line segments on the ground, and the projection without angular distortion is called
~
.