What does GM mean in ACADEMIC DEGREES
In the field of science, GM stands for Geographic Meridian. It is a fundamental concept used for mapping and navigation.
GM meaning in Academic Degrees in Academic & Science
GM mostly used in an acronym Academic Degrees in Category Academic & Science that means Geographic Merdian
Shorthand: GM,
Full Form: Geographic Merdian
For more information of "Geographic Merdian", see the section below.
What is a Geographic Meridian?
A geographic meridian is an imaginary line of longitude that runs from the North Pole to the South Pole. It connects points on the Earth's surface that have the same longitude, which is the angular distance east or west of the Prime Meridian.
Key Characteristics
- Vertical Lines: Meridians are vertical lines on a map or globe.
- Parallel Lines: They run parallel to each other, except at the poles where they converge.
- Equidistant Spacing: The distance between two meridians is approximately 111 kilometers (69 miles) at the equator.
- Reference Point: The Prime Meridian (also known as the Greenwich Meridian) is the reference point for measuring longitude. It is located at 0° longitude and passes through the Royal Observatory in Greenwich, England.
Uses of Geographic Meridians
- Mapping: Meridians are used to construct maps and globes, providing a framework for locating and navigating across the Earth's surface.
- Navigation: Sailors, aviators, and hikers rely on meridians to determine their longitude and plan their course.
- Time Zones: Meridians are used to establish time zones. Each 15 degrees of longitude corresponds to one hour of time difference.
- Cartography: Meridians are essential in creating accurate maps and charts, providing a reference system for scale and orientation.
Essential Questions and Answers on Geographic Merdian in "SCIENCE»DEGREES"
What is a Geographic Merdian (GM)?
A Geographic Merdian (GM) is an imaginary line of longitude that runs from the North Pole to the South Pole, passing through the Greenwich Royal Observatory in London, England. It is used as the reference point for measuring longitude, which is the angular distance east or west of the GM.
Why is the Greenwich Merdian used as the reference point for longitude?
The Greenwich Merdian was chosen as the reference point for longitude because it passes through the Greenwich Royal Observatory, which was established in 1675 as the center of British navigation and astronomy. In 1884, the International Meridian Conference held in Washington, D.C., adopted the Greenwich Merdian as the prime meridian for the world.
How are longitudes measured?
Longitudes are measured in degrees, minutes, and seconds. The longitude of a location is the angle between the GM and the meridian of that location. The meridian of a location is an imaginary line that passes through the location and both the North Pole and South Pole.
What is the difference between longitude and latitude?
Longitude and latitude are two coordinates used to define the location of a point on the Earth's surface. Longitude measures the angular distance east or west of the GM, while latitude measures the angular distance north or south of the equator.
What is the importance of the Geographic Merdian?
The Geographic Merdian is important because it serves as the reference point for measuring longitude, which is essential for navigation and mapping. It also plays a role in timekeeping, as the Earth's time zones are based on the GM.
Final Words: GM (Geographic Meridian) is a cornerstone of navigation and mapping. It provides a framework for understanding the Earth's surface, measuring distances, and establishing time zones. Geographers, cartographers, and navigators rely heavily on meridians to accurately represent and explore our planet.
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