Question

What is called the north line?

Answer 1

Hint: North is one of the four cardinal directions, or compass points. It is perpendicular to the east and west and is the polar opposite of the south. North is a direction or geography-related noun, adjective, or adverb. North is the direction that is regarded as the essential direction in Western culture.

Complete answer:
In the upper right-hand corner of most maps, there is an arrow marked with the letter 'N.' This arrow points in the direction of the north. It's known as the north line. When you know which way is the north, you can figure out which way is east, west, or south.

The direction represented as north on a correctly operating (but uncorrected) magnetic compass is known as magnetic north. The magnetic declination is the difference between it and true north (or simply the declination where the context is clear).

The inaccuracy in the direction that arises from neglecting the distinction is reasonable for many purposes and physical circumstances; in others, a mental or instrument adjustment based on assumed knowledge of the applicable declination can alleviate all difficulties. Simple generalisations on the subject, on the other hand, should be considered with caution, as they are more likely to reflect widespread beliefs regarding terrestrial magnification.

Note: Maps designed for the compass orienteering will clearly show the local declination to allow for easy adjustment to true north. Grid north, a navigational word referring to the direction northwards along the grid lines of a map projection, may also be indicated on maps.