Latitude and longitude are measured in degrees, minutes and seconds. As with time measurements, there are 60 seconds to a minute, and 60 minutes to a degree. Many GIS (Geographical Information System) programs express latitude and longitude in degrees only, with the minutes and seconds converted to fractional degrees. For example,
Latitude 40°15'30" can also be expressed as Latitude 40.25833333333333Implement a method
decimalDegrees to carry out this conversion. Note that degrees may be negative. Use the Math class method abs when computing the decimal degrees. Use the Math class method signum as a multiplier so that the decimal degrees have the same sign as the degrees.