Azimuthal refers to the measurement or mapping of positions or distances on a plane surface. There are several synonyms for azimuthal that describe a similar concept, including planar, horizontal, flat, and two-dimensional. These words are often used in the context of cartography, astronomy, and navigation. A related term, polar, refers to measurements or mapping in a radial, circular, or spherical direction. Other synonyms for azimuthal include equatorial and perpendicular. Despite slight variations in meaning, each of these words describes a system of measurement or mapping that is essential for accurately representing data in a two-dimensional space.