Directory of Map Projections

What is a projection?

Previous | Next

ellipsoidal Lambert conformal conic

Gauss conformal conic


Aspects of: Lambert conformal conic

Parameters: Latitude of origin, Standard parallel 1, Standard parallel 2


The ellipsoidal form of the Lambert conformal conic projection. Two parallels can be designated to have the same scale, with that scale being deemed true scale.




Meridians: Straight lines, infinite in extent in a full world projection.
Parallels: Arcs of circles.
Poles: One is a point; one is at an infinite distance.


Latitude of origin: The latitude at which the central meridian is deemed to have a value of (0, 0). This setting has non visible effect; its purpose is to yield plane coordinates that match other sources.
Standard parallel 1: Parallel along which scale is to be correct.
Standard parallel 2: Parallel along which scale is to be correct.


The Lambert conformal conic is used extensively in aeronautical charts and in national mapping systems. It excels at low-distortion portrayals of regions of long east-west extent. Optimizing the projection for the space is complicated, but a useful rule is to place the standard parallels ⅙th the way in from the maximum north-south extent of the map.


Johann Heinrich Lambert presented the projection in 1772.

Description ©2010–2020 Mapthematics LLC.