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.
If you look at the picture above you will notice the latitude and longitude in the upper right hand corner of the map. You would read it as 35 degrees 22 minutes 30 seconds north latitude and 111 degrees 30 minutes west longitude. Below the title you will notice the words 7.5 minute map. This means that the map covers an area of 7.5 minutes of latitude and longitude.