Browse Definitions:
Definition

# latitude and longitude

Latitude and longitude are angles that uniquely define points on a sphere. Together, the angles comprise a coordinate scheme that can locate or identify geographic positions on the surfaces of planets such as the earth.

Latitude is defined with respect to an equatorial reference plane. This plane passes through the center C of the sphere, and also contains the great circle representing the equator. The latitude of a point P on the surface is defined as the angle that a straight line, passing through both P and C, subtends with respect to the equatorial plane. If P is above the reference plane, the latitude is positive (or northerly); if P is below the reference plane, the latitude is negative (or southerly). Latitude angles can range up to +90 degrees (or 90 degrees north), and down to -90 degrees (or 90 degrees south). Latitudes of +90 and -90 degrees correspond to the north and south geographic poles on the earth, respectively.

Longitude is defined in terms of meridians, which are half-circles running from pole to pole. A reference meridian, called the prime meridian , is selected, and this forms the reference by which longitudes are defined. On the earth, the prime meridian passes through Greenwich, England; for this reason it is also called the Greenwich meridian. The longitude of a point P on the surface is defined as the angle that the plane containing the meridian passing through P subtends with respect to the plane containing the prime meridian. If P is to the east of the prime meridian, the longitude is positive; if P is to the west of the prime meridian, the longitude is negative. Longitude angles can range up to +180 degrees (180 degrees east), and down to -180 degrees (180 degrees west). The +180 and -180 degree longitude meridians coincide directly opposite the prime meridian.

Latitude and longitude coordinates on the earth are sometimes extended into space to form a set of celestial coordinates.

This was last updated in June 2015

#### Join the conversation

Send me notifications when other members comment.
Cancel
Very helpful,because explained clearly in simple words with drawing .

Thanks a lot.
NKP SINGH
Cancel
I have googled but the best i have read and it is so clear
Cancel
nice explanation
Cancel
thee explanation confused me a lot
Cancel
really simple and informative even though i am not interested in such topic
Cancel
thanks, simple and clear
Cancel
Crisp clear explanation. Thank You!
Cancel
Thanks,
Now I get the clear concept.
Cancel
hurrah!finally i got the notes
Cancel
Thank you very much
Cancel
well done :)
now my concept is so clear.
thanks
Cancel
thank you so much superb explantn in easy lang i searched so many sites finally found dis one worth it..
Cancel
thanks for the answer its really help full.
Cancel
very lucid....
Cancel
it woks
Cancel
great help thank you
Cancel
thank you very helpful from to yo
Cancel
Great....thx..
Cancel
Cancel
thanks a ton...for this simple explanation..
Cancel
It really helped me very much
Cancel
It helped me and so I got my notes
Cancel
it is helpfull for seminor, assignment,thankyou.
Cancel
thank you for helping me to clearly understand latitude and longitude
Cancel
I have a test and this helped me a lot thanks and well I passed it well done for me happy face lol
Cancel
really easy to understand...Thanks :)
Cancel
this helped a lot with my HW . thanks for the help ;)
Cancel
Just kidding it helped me alot thankx for the info
Cancel
Thanks it was easy and helpful to do my hw
Cancel
Sorry, but this didn't help me at all
Cancel
Thanks..very well explained!
Cancel
that is a longitude and latitude this is a pont

Cancel
thanx for this info.
Cancel
Excellent explanation of longitude and latitude.
Cancel

## SearchCompliance

• ### risk map (risk heat map)

A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces.

• ### internal audit (IA)

An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

• ### pure risk (absolute risk)

Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

## SearchSecurity

• ### FIDO (Fast Identity Online)

FIDO (Fast ID Online) is a set of technology-agnostic security specifications for strong authentication. FIDO is developed by the...

• ### cryptanalysis

Cryptanalysis is the study of ciphertext, ciphers and cryptosystems with the aim of understanding how they work and finding and ...

• ### Trojan horse (computing)

In computing, a Trojan horse is a program that appears harmless, but is, in fact, malicious.

## SearchHealthIT

• ### vendor neutral archive (VNA)

A vendor neutral archive (VNA) is a technology that stores medical images in a standard format and interface, making them ...

• ### HITECH (Health Information Technology for Economic and Clinical Health) Act of 2009

The HITECH (Health Information Technology for Economic and Clinical Health) Act of 2009 is legislation that was created to ...

• ### Epic Systems

Epic Systems is one of the largest providers of health information technology, used primarily by large U.S. hospitals and health ...

## SearchDisasterRecovery

• ### business continuity and disaster recovery (BCDR)

Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

• ### business continuity plan (BCP)

A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

• ### call tree

A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

## SearchStorage

• ### cloud storage provider

A cloud storage provider, also known as a managed service provider (MSP), is a company that offers organizations and individuals ...

• ### personal cloud storage (PCS)

Personal cloud storage (PCS) enables users to store data, photos, music, videos and other files on a local network-attached ...

• ### cloud SLA (cloud service-level agreement)

A cloud SLA (cloud service-level agreement) is an agreement between a cloud service provider and a customer that ensures a ...

## SearchSolidStateStorage

• ### hybrid hard disk drive (HDD)

A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close