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.
Latitude and longitude values on earth. Latitude and longitude are both measured in degrees, minutes and seconds. There are 60 minutes in each degree and 60 seconds in each minute. Values for longitude range from 0 (for the Prime Meridian) to 180 degrees. They are denoted by the letters E or W to represent direction.