longitude : Java Glossary

For computation, you might use double fractional degrees, or radians. For display, you usually display as integral degrees, minutes and seconds (or second.fractions of seconds) of arc.

For computation, you might use double fractional degrees, or radians. For display, you usually display as integral degrees, minutes and seconds (or second.fractions of seconds) of arc.

One way of displaying the values is Latitude N+48°26’188”, Longitude W-123°21’158”. or Latitude N+48°26’188”, Longitude W-123°21’158”in HTML .

Some people prefer to put the N or W at the end. Since it is the most significant part of the value, I think it belongs at the left end, as does Google.

Some people prefer to format it: Latitude N+48"26'188", Longitude W-123"21'158". or Latitude N+48"26'188", Longitude W-123"21'158" in HTML.

Some people leave out the N and W and use only + and - signs. Others use only signs without the N and W.

We need an ISO standard latitude/longitude format! A GPS unit can calculate the current longitude by triangulating satellite signals. In the days of sailing ships, determining longitude depended on having an accurate clock so that you could compare the time of day from observing the sun with the time back home at the prime meridian.

There are commercial databases so that you can guess the longitude of a server from its IP.