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.
Lines of latitude. On a globe of the Earth, lines of latitude are circles of different size. The longest is the equator, whose latitude is zero, while at the poles--at latitudes 90Â° north and 90Â° south (or -90Â°) the circles shrink to a point.Longitude On the globe, lines of constant longitude (meridians) extend from pole to pole, like the segment boundaries on a peeled orange.ines of latitude. On a globe of the Earth, lines of latitude are circles of different size. The longest is the equator, whose latitude is zero, while at the poles--at latitudes 90Â° north and 90Â° south (or -90Â°) the circles shrink to a point.