GPS+Digital+Maps

GPS-presentation history http://www.beyonddiscovery.org/content/view.article.asp?a=458 google earth regular plus pro geocoding or geotaging, http://www.batchgeocode.com/ Geocoding is the process of assigning geographic coordinates (e.g. latitude-longitude) to street addresses, as well as other points and features. With geographic coordinates, the features can then be mapped and entered into Geographic Information Systems. orGeotagging, (sometimes referred to as Geocoding), is the process of adding geographical identification metadata to various media such as websites, RSS feeds, or images. This data usually consists of latitude and longitude coordinates, though it can also include altitude and place names. how it works NavStar 70 million a yera to runhas 27/31 satelllites (24/28 operating at once) and accurate to within 16 meters GPS units the others Russia, Glonass, shares with the US, #17 satellites China, Beidou, 1993, 34 satellites EU,Galileo, will launch in 2012, #30 satellites Japan, TBA, #3 satellites India,, 2012, #7 satellites GPS satellites, http://electronics.howstuffworks.com/gps.htm the stellites are solar powered, weigh3to4K pounds, and make 2 complete rotations per day (12,000 miles)4 GPS calculations, http://electronics.howstuffworks.com/gps3.htm longitude and latitude http://www.phy6.org/stargaze/Slatlong.htm