Differential-geometrical Property

We make a distinction between three differential-geometrical properties:

Partial length-preserving projection

Projection with length-preserving of specified curves and/or equidistance of parallels of latitude, e.g. the Plate Carrée Map.

Partial equal-area (equivalent) projection

Projection with preservation of the size of pieces of areas, e.g. the projection by Mollweide.

Conformal (orthomorphic) projection

A very important example for a conformal map is the sea chart.