Submitted by: Submitted by Jimbob
Views: 94
Words: 1389
Pages: 6
Category: Other Topics
Date Submitted: 02/28/2014 05:51 PM
Charts / AFD
Latitude: a geographic coordinate that specifies the north-south position of a point on the Earth's surface.
-Latitude is an angle (defined below) which ranges from 0° at the Equator to 90° (North or South) at the poles.
-Lines of constant latitude, or parallels, run east–west as circles parallel to the equator.
-Latitude is used together with longitude to specify the precise location of features on the surface of the Earth.
Longitude: is a geographic coordinate that specifies the east-west position of a point on the Earth's surface.
-It is an angular measurement, usually expressed in degrees Points with the same longitude lie in lines running from the North Pole to the South Pole.
-By convention, one of these, the Prime Meridian, which passes through the Royal Observatory, Greenwich, England, was intended to establish the position of zero degrees longitude.
-The longitude of other places was to be measured as the angle east or west from the Prime Meridian, ranging from 0° at the Prime Meridian to +180° eastward and −180° westward.
- Specifically, it is the angle between a plane containing the Prime Meridian and a plane containing the North Pole, South Pole and the location in question.
Going back to old navigation, they divided up a degree into 60 minutes where each minute is divided up into 60 seconds.
-This is the most common format used to mark maps. It's also the most cumbersome to work with. It's a lot like telling time…
-There are sixty seconds in a minute (60" = 1') and
-There are sixty minutes in a degree (60' = 1°).
Keeping in mind a few easy conversions between seconds and decimal minutes will help when working with maps that use degrees, minutes and seconds.
15 seconds is one quarter of a minute or 0.25 minutes
30 seconds is one half of a minute or 0.5 minutes
45 seconds is three quarters of a minute or 0.75 minutes
Positive values of latitude are north of the equator, negative values to the south.
John Wayne...