I want to know something about sailing. What do you think of the sailing place, longitude and latitude?

The first action to look at a map is to turn the map to the north, that is, turn the north of the map upward, and then press up, north, south, left, west, right and east to set the other three directions. Meridian, also called meridian, is perpendicular to the equator and connects the north and south poles. Starting from the prime meridian, the east and west points are 180 degrees, which means there are 180 meridians each. Latitude is parallel to the equator. From the equator, the north and south are separated by 90 degrees, that is, there are 90 latitudes each. The intersection of latitude and longitude lines is the coordinate, which is the most basic.