polar coordinates

For one, these maps often use narrative to chart the landscape, rather than constraining it to a grid with coordinates.

Long before that, however, the sun had come back to gladden the Polar regions, and break up the reign of ancient night.

The same would be the case if the polar axis of one sphere stood precisely at right angles to that of the other.

Thus the wide habitability of the earth is an effect arising from the inclination of its polar axis.

Let us conceive a particle of air situated immediately over the earth's polar axis.

On the equatorial side this air is moving more rapidly than it is on the polar side.