What are the uses of latitude and longitude? What is the range of latitude and longitude? Does #1 and #2 make it possible to locate most people's homes?
Longitude
My home is a location on earth where I live.  Latitude and Longitude are geographic coordinate systems that identify east/west and north/south locations. Specific Latitude and Longitude coordinates can be used to pinpoint specific locations.  Every point on the earth has a corresponding latitude and longitude coordinate. 
A geographic coordinate that specifies the east-west position of a point on the Earth's surface
Can I find my home with latitude and longitude?