The mapping angle in a Lambert projection varies with which factor?

In a Lambert projection, the mapping angle, which refers to the angle at which meridians of longitude are represented in relation to the parallels of latitude, varies with longitude. The Lambert conformal conic projection is specifically designed to maintain angles locally, making it particularly useful for aeronautical and nautical charts where angle preservation is important. While latitude also plays a role in the projection, it is the longitude that influences how those angles are visually represented across the map.

As one moves east or west along a given latitude, the representation of angles can change significantly. This characteristic is critical in ensuring that measurements of angles are true to scale in regions for which the projection is intended, like areas between specific latitudes. The projection works best for regions with a greater east-west extent, illustrating the way longitude affects the mapping angle.