All of the coastal areas have one thing in common, the land platforms were formed by the oceans waves. The waves had disintegrated the shore causing its shape and size, which will change more over time.
The Moon appears to change shape because we see different amounts of the lit part as the Moon orbits Earth. From Earth's perspective, we see varying amounts of the illuminated part of the Moon.
Maps are representation of a geographic region on paper. Small scale maps depict a larger geographic area with few details . Small scale maps usually show less details than large scale maps, but depict larger parts of the Earth.
Maps with regional, national, and international extents usually require small scale .
