GPS, EarthCache

United State Department of Defense placed a set of satellites into the orbit, which

is called a (GPS). In fact, the Global Positioning System (GPS) is based on navigation

system that includes 24 network satellites. The reason why United State Department of

Defense developed this innovation is because of the military used. In 1980s, the U.S. 

government makes (GPS) available to use by the civilian. The most amazing thing is

(GPS) works in any weather conditions. Further, we can use it wherever we go and it

works 24 hours a day. On the other hand, high speed internet is required and we can use

the (GPS) for free. There is a huge usage of GPS by some educational website such as

EarthCache.    

World is interesting. Traveling become a passion for some people because of the

fact that world has to many precious area to know. Usually, it is hard to travel especially

if the purpose of traveling is to discover a geological feature of our planet. However,

EarthCache make this job more easy and possible for the people who seek this

knowledge. EarthCache is a special website cares about the unique feature of the earth.

Furthermore, it includes a set of educational notes, which are along with coordinates. The

most amazing and interesting part about the EarthCache is the people can see how the our

planet has been shaped by the time beside the geological effects. In fact, GPS is a

widespread usage by the EarthCache. Most of the EarthCache websites must have some

scientific knowledge about the website itself due to the fact that they meant to be for an

educational purposes. Also, the Geological Society of America (GSA) has to oversight

and approve the EarthCache sites, which make them reliable to use.