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. To navigate the globe and pin-point your position in the world one uses a coordinate system. There exists several coordinate systems for mapping the globe, but the most common is WGS84 latitude and longitude coordinates. Latitude is vertical direction (Y axis) indicating how many degrees north or south of equator.