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.
Longitude is measured in degrees, minutes and seconds starting from the <br /> Prime Meridian which runs through Greenwich, England (O point of Longitude ) <br /> and proceeding 180 degrees East and West of the Prime, so all the way around <br /> the Earth comprises 360 degrees of longitude.