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Ideally, the International Date Line should be the meridian of 180° longitude. Actually,

it has been zigged and zagged to avoid cutting across any island or country, since to do

so would put two different calendar dates in the same country simultaneously.

If the IDL coincided with the 180° meridian, then together with the Prime Meridian, it would

form a great circle on the earth, passing through the north and south poles as well as through

Greenwich. As it is now, the Prime Meridian, the 180° meridian, and all other meridians of longitude

are semi-circles, that begin and end at the poles.

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Q: What does the prime meridian and international dateline combine to do?
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Related questions

How many degrees longitude are there between the prime meridian and the international dateline?

Morocco


Is the international date line used to measure latitude?

No. The Prime Meridian is. The International Dateline nominally (but not exactly) follows the 180° meridian ... exactly opposite and half a world away from the Prime Meridian.


Is the prime meridian the international dateline?

Midnight, on the morning of the day after.


What is the great circle formed by the prime meridian and the international dateline cuts earth in half the part east of the prime meridian?

the great circle is formed by the prime meridian and the international date line


How many degrees from the greenwich meridian is the international dateline?

The Greenwhich meridian also Prime Meridian is 0 degrees longitude and International Date Line roughly follows the 180° longitude or antimeridian. The antimeridian is the meridian which is 180° east or west of the Prime Meridian.


Is the international date line known as meridans?

no the international dateline is 180 degrees, but the meridians; or prime meridian is 0 degrees.


Where would the prime meridian and international dateline be placed on a world map?

Most world maps are drawn with the Prime Meridian at or near the center and the International Date Line at or near the left and/or right edge(s).


Name of the lines running from the north to south pole?

Longitude. Prime meridian and international dateline are also included.


What is it closer to the prime meridian or international dateline?

I have a feeling that the meaning of "it" in this question is of paramount significance, and that if we but knew it, an answer would be possible.


Which country has forced the 3000 mile deviation of the Prime Meridian?

There is no deviation of the Prime Meridian. There are a few deviations of the International Dateline, but none of them is anywhere near 3,000 miles away from the meridian of 180 degrees longitude.


Is the international dateline the primemeridian?

The Prime Meridian and its opposite the 180th meridian (at 180° longitude), which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern and Western Hemispheres.


What line of longitude would be 180 degrees away from the prime meridian?

The 180th meridian or antimeridian is the meridian which is 180° east or west of the Prime Meridian ... It is common to both east longitude and west longitude. It runs through the Pacific Ocean, and was the nominal guideline for the position of the International Dateline, although the dateline itself had to depart from the antimeridian in several places.