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.
The surface of the globe is divided into lines of longitude and latitude defining 360 of angle (and therefore location) in an east-west direction (lines of longitude) and 180 of angle in a north-south direction.or example, for the point defined by coordinates 71 W longitude and 20 S latitude, the rectangle shown in Figure 3 can be found. In this example, the lines of longitude and latitude are provided at every 15 degrees. On other maps, a different interval may be present.