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

Continue Reading About latitude and longitude

Join the conversation

35 comments

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

thanks, that was helpful
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.
Really helpful.
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
great..thanks to uploader :)
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

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • 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. A...

  • internal audit (IA)

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

SearchSecurity

  • evil maid attack

    An evil maid attack is a security exploit that targets a computing device that has been shut down and left unattended.  An evil ...

  • Common Body of Knowledge (CBK)

    In security, Common Body of Knowledge (CBK) is a comprehensive framework of all the relevant subjects a security professional ...

  • rootkit

    A rootkit is a program or, more often, a collection of software tools that gives a threat actor remote access to and control over...

SearchHealthIT

  • value-based healthcare

    Value-based healthcare, also known as value-based care, is a payment model that rewards healthcare providers for providing ...

  • health informatics

    Health informatics is the practice of acquiring, studying and managing health data and applying medical concepts in conjunction ...

  • clinical trial

    A clinical trial, also known as a clinical research study, is a protocol to evaluate the effects and efficacy of experimental ...

SearchDisasterRecovery

  • crisis communication

    Crisis communication is a method of corresponding with people and organizations during a disruptive event to provide them with ...

  • Zerto

    Zerto is a storage software vendor that specializes in enterprise-class business continuity and disaster recovery in virtual and ...

  • crisis management plan (CMP)

    A crisis management plan (CMP) is a document that outlines the processes an organization will use to respond to a critical ...

SearchStorage

  • cache memory

    Cache memory, also called CPU memory, is high-speed static random access memory (SRAM) that a computer microprocessor can access ...

  • RAID 10 (RAID 1+0)

    RAID 10, also known as RAID 1+0, is a RAID configuration that combines disk mirroring and disk striping to protect data.

  • Red Hat OpenStack Platform

    Red Hat OpenStack Platform is a commercially supported distribution of open source OpenStack software designed to build and ...

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