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# How Is Longitude Measured?

### Understanding Latitude and Longitude

Every location on earth has a global address. Because the address is in numbers, people can communicate about location no matter what language they might speak. A global address is given as two numbers called coordinates. The two numbers are a location's latitude number and its longitude number ("Lat/Long").

### 3 Ways to Determine Latitude and Longitude

wikiHow to Determine Latitude and Longitude

Three Methods:Understanding Latitude and LongitudeUsing a MapMeasuring Using a ProtractorCommunity Q&A

Latitude and longitude can be used to determine the exact location of any point on the globe. There are several ways to find your latitude and longitude - some of which require many more resources than others. Find your coordinates with a map and protector once you understand latitude and longitude.

### Latitude and Longitude

Longitude works the same way. It is angular distance measured east and west of the Prime Meridian (which has been arbitrarily set at Greenwich, England). The prime meridian is 0 degrees longitude. As you go east from the prime meridian, the longitude increases to 180 degrees. As you go west from the prime meridian longitude increases to 180 degrees. The 180 degree meridian is also known as the international date line. In the eastern hemisphere the longitude is given in degrees east and in the western hemisphere it is given in degrees west.

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