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Longitude lines are the North/South lines that separate the earth in 15 degree sections. They are used for navigation.
"No-man's-land" because no one side controlled the area between the trench lines .
Longitude
Lines of longitude run north-south from pole to pole. They are an angular measure of how far east or west you are of the prime meridean which runs, north-south, through Greenwich, England.
Find Iraq, Egypt, India, Mexico, and China on a map, between those lattude lines. They're all around 23.5N.
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Peel an orange. The lines between the sections of the orange are similar to the pattern of longitude lines on the globe.
Latitude is side to side and longitude is up and down.
The Equator
Greece is in between 15 and 30 degrease East.......so that means it is about 20 degrease east in lines of longitude.
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157 and 158 West
If you pick a longitude and mark a dot at every point on Earth with that longitude, the dots will form a line between the north and south poles. The imaginary line is called the "meridian" of that longitude.
grid lines of longitude and latitude
"Lines of longitude" are conceptual, not physical; there can be as many as we want. For example, there are 3600 "seconds of longitude" between each degree of longitude. That's 60 minutes of arc per degree, and 60 seconds of arc per minute.
Imaginary lines that run north to south are known as lines of longitude. Longitude lines are the imaginary lines running through the Earth between the North and South Poles. They are arbitrary and used for reference so everyone can know where they are in the world. The lines running north and south are called "meridians" or "lines of longitude."