No. The Prime Meridian is about Longitude, which was far more difficult to calculate than Latitude. Latitude can be measured by knowing how high the Sun is above the horizon & by the Stars at night. Longitude needs the addition of knowing time at one place & another place & speed & direction of movement. The Prime Meridian, 0 degrees Longitude runs from Pole to Pole through Greenwich, London. (The Headquarters of the Royal Navy at the time) 0 degrees latitude is the Equator.
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The 'lines' to which you refer are 'meridians' of longitude. They run north and south, from pole to pole. They are numbered, begining at Greenwich, England, with zero, also known as the 'prime' (i.e., first) meridian.
The equator is the prime parallel of latitude, mostly because it is the longest and circles the center of the planet. The other lines of latitude are numbered from the equator towards the North Pole and the South Pole.
The starting line is at the prime meridian; which measures 0 degrees. It intersects Greenwich England by Definition.
THE latitude and longitude of Tasmania is 147 E and 42 S
Dava Sobel
The Line of Demarcation was an imaginary division of territory on the Earth at 50 degrees longitude, which was used to separate the boundaries of Portugal and Spain made in the year 1493 by Pope Alexander VI and later by Pope Julian II. Spain controlled territory west of the line, while Portugal controlled territory east of the line. The line was moved 800 miles further west with the signing of the Treaty of Tordesillas in 1494 a year later.In short The Line OF Demarcation, divided the non-European world into two trading and exploration zones one for Spain and one for Portugal. The two nations agreed to these terms in the Treaty of Tordesillas.the line of democration is an imaginary line running down the middle of the Atlantic from the North Pole to the South Pole.
Jason
it is called Dharma Chakra (which means the wheel of law) the 24 lines coming out of the center of the circle represent the 24 hours in a day (At the the end of each line is a dark blue half-moon)