Many large-scale maps use conformal projections because figures in large-scale maps can be regarded as small enough. The figures on the maps are nearly similar to their physical counterparts. A non-conformal projection can be used in a limited domain such that the projection is locally conformal.
What is a conformal projection used for?
A conformal projection is a map projection that favors preserving the shape of features on the map but may greatly distort the size of features.
What is a conformal map used for?
In mathematics, a conformal map is a function that locally preserves angles, but not necessarily lengths. , as well as preserving orientation. Conformal maps preserve both angles and the shapes of infinitesimally small figures, but not necessarily their size or curvature.