The lines on a global grid that run from pole to pole are called meridians of longitude. The prime meridian, which passes through Greenwich, London, is the most well-known and has a longitude of 0 degrees. The meridian at 180 degrees, opposite the prime meridian, is called the International Date Line.
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The prime meridian in located at 0 degress longitude, and passes through Grenich, England.
The prime meridian and the equator are alike because they are both invisible lines that split the earth in half. The equator is horizontal (side to side) and the prime meridian is vertical (up and down). The equator divides the Northern and Southern Hemisphere and the Prime Meridian divides the Western and Eastern Hemisphere.
Latitude is a series of imaginary lines running horizontally across a map to denote position north to south. Longitude is the lines running vertically to denote east west position. Prime meridian is the line running north south, passing through Greenwich, England and is 0 degrees longitude. Equator is the same but for latitude. A grid is a series of horizontal and vertical lines arranged so you can plot position on them easily and accurately.
The Equator and Prime Meridian
Meridian
longitude, latitude, equator, prime meridian
meridian
zero longitude
The geographic grid line 180 degrees of longitude from the Prime Meridian is the International Date Line. This line marks the boundary where the date changes as one travels across it from west to east.
The lines on a global grid that run from pole to pole are called meridians of longitude. The prime meridian, which passes through Greenwich, London, is the most well-known and has a longitude of 0 degrees. The meridian at 180 degrees, opposite the prime meridian, is called the International Date Line.
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There are three norths: true north, magnetic north and grid north. According to www.ordnancesurvey.co.uk, the three norths are defined as follows: Grid North: the direction of a grid line which is parallel to the central meridian on the National Grid. True North: the direction of a meridian of longitude which converges on the North Pole. Magnetic North: the direction indicated by a magnetic compass. Magnetic North moves slowly with a variable rate and currently is west of Grid North in Great Britain.
Best Answer - Chosen by Voters hemisphere/ equator/ prime meridian/ latitude/ longitude
Best Answer - Chosen by Voters hemisphere/ equator/ prime meridian/ latitude/ longitude
They don't. All you have there is one great circle and one great semi-circle, on the same spherical surface, that are perpendicular where they intersect. If you want a grid, you'll have to find an old 6L6GB or a 12AT7 somewhere.