Symptoms include: 1  Itching. 2  Significant tearing and production of thick mucus. 3  The feeling of having something in the eye (foreign body sensation) 4  Aversion to light (photophobia)
Geographic coordinate system. Longitude lines are perpendicular to and latitude lines are parallel to the equator. A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position, and two or three of the numbers represent a horizontal position.
Zero degrees (0Â°) latitude is the equator, the widest circumference of the globe. Latitude is measured from 0Â° to 90Â° north and 0Â° to 90Â° southâ90Â° north is the North Pole and 90Â° south is the South Pole. longitude lines. Imaginary lines, also called meridians, running vertically around the globe.