What is gnomonic chart?

A gnomonic chart is a type of map projection that represents the surface of the Earth on a flat plane, where great circles are depicted as straight lines. This projection is created by projecting points from the Earth's surface onto a tangent plane from the center of the Earth. Gnomonic charts are useful for navigation and route planning because they provide the shortest path between two points. However, they distort shapes and areas significantly, especially away from the center point of the projection.