# What is the meridian

### equator

The equator is an imaginary line that divides the globe into the northern and southern hemispheres. The terms Northern and Southern Hemisphere are also used synonymously. The latitude 0 is assigned to the equator.

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### Prime Meridian

The prime meridian is a semicircle perpendicular to the equator and running from north to south pole, from which the geographical longitude to east and west is determined. It runs through Greenwich near London and has been internationally recognized since 1884.

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### Zero point

The zero point is the intersection between the equator and the prime meridian and is located in the Gulf of Guinea (Africa).

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### Latitude

With the help of the latitude, the globe is divided into the northern and southern directions. This was already used for navigation by seafarers in the late 15th century.

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### Longitude

The longitudes divide the earth into east and west directions. The geographical longitude is measured starting from the prime meridian (0 degrees) up to 180 degrees in an easterly and westerly direction.

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### 23.5 degrees

The earth moves around the sun at an angle of 23.5 degrees. It is precisely this tendency that has a decisive influence on the earth's climate and thus makes the four seasons possible.

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### meridian

A full or half meridian is used to hold the earth inside a globe. Meridians are usually engraved or printed with the latitude.

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### Graticule

The graticule is an imaginary line network that is used to determine the geographical position and orientation and is drawn across the globe. The lines intersecting at right angles (geographical coordinates) consist of circles of longitude and circles of latitude. Among the 360 ​​circles of longitude that run through the geographic North Pole and South Pole and are of equal length (great circles), the prime meridian has a special position. Their distance is 111.31 km at the equator and zero at the pole.

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### Time slice

You can use the time slice to quickly determine the time of day at a distant location. Find your location on the globe and set the local time. The time slice automatically shows the appropriate time at all other lengths. Unfortunately, with this technique, the exact boundaries of the time zones cannot be taken into account.

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