Two projection surfaces"To project" means transferring Earth features to a suitable surface, like a tangent plane or a truncated secant cone. Regions nearer the surface are usually better presented.

 

Projection surfacesCones and cylinders can be useful intermediary surfaces, but the darker conversion paths unavoidably incur in distortion.

  Normal Transverse Oblique
Planar (azimuthal) Normal aspect, planar projection Transverse aspect, planar projection Oblique aspect, planar projection
  (polar) (equatorial)  
 
Cylindrical Normal aspect, planar projection Transverse aspect, planar projection Oblique aspect, planar projection
  (equatorial)    
 
Conic Normal aspect, planar projection Transverse aspect, planar projection Oblique aspect, planar projection
  (polar) (seldom used) (seldom used)
 

Comparing Projections