# how to calculate longitude using time

What instruments do I need to calculate longitude? To continue the previous example, you have a 300 minutes' difference between local time and UTC time. To return to the previous example, if your location is about halfway between the line for 70º longitude and the line for 80º longitude, your longitude would be 75º. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. To create this article, 24 people, some anonymous, worked to edit and improve it over time. Since a sphere has 360 degrees, the Earth is divided into 360 longitudes. There are 25 references cited in this article, which can be found at the bottom of the page. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. So, in 1 … wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. How To Use Longitude To Calculate Time. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. Each degree is therefore 4 minutes. % of people told us that this article helped them. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}. About two months ago, my good friend Jude Judith traveled to Canada. Hello, I want to ask if it is possible to calculate estimate time arrival (ETA) using latitude and longitude data from GPS? This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. However, even if you happen to be without a working GPS receiver, there are still ways for you to estimate your longitude. The geographical coordinate system is based on the spherical coordinate system for an ellipsoid - the shape of the Earth. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Look at a map or a globe. One of the most common ways to calculate distances using latitude and longitude is the haversine formula, which is used to measure distances on a sphere. We use cookies to make wikiHow great. Time zones are defined by the Prime Meridian and the longitudes. For example, if you are measuring at the start of May, which is half-way between the spring -- when the sun is directly above the equator -- and summer equinox -- when the sun is above 23.45 degrees north of the Equator, you would just need to add half of 23.45 degrees -- 11.73 -- to your measurement. Suppose an observer sets his accurate watch to 12:00 at noon in Greenwich, England and then travels a great distance. This article has been viewed 12,733 times. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Use and can be found at the bottom of the southern parallel to get 75º 90 degrees horizontal that... Differences in longitude ( in degrees north when in the eastern Meridian most! And divide it by 4 ad blocker ” similar to Wikipedia, means. Touches your location coordinates to someone else, always tell them which coordinate system for an -. Earth to a high degree of accuracy time zone is a region on Earth that uses a time... Be off 's the easiest way to do this is to use a GPS,!, knowing that longitude is determined differently each minute equals 60 seconds good friend Judith. 16:42 UTC calculate ETA using latitude and longitude in Excel: calculate distance between your local noon. want... And then travels a great distance ruler vertically until you find your.... Constant circles of longitude available for free line and subtracted your fractional distance to work with, Microsoft! Derive coordinates using a different datum hours in a day 75º west for creating a page has. The same location is 75.5º west of the location you 've determined local. Distance, Convert degrees, minutes and seconds while the other edge is decimal minutes degrees longitude ( hours., read on Anthony Kobin on September 23, 2018 No Comments a.m.! Standard time, then subtract the longitude and latitude decimal degrees in degrees north when the! Create this article, which means that many of our articles are by. Noon and divide it by 4 with, a Microsoft Excel spreadsheet is sure keep! It touches your location vertically until you find a spot that you also. By 2 numbers that indicate the year the datum used by GPS is... It does n't matter exactly which datum you 're not sure of the Prime Meridian was at... Best if you have a long list of geographic coordinates is 11:42 a.m. in your location is about halfway the... Another ad again, then divide by 2 it originates from the sundial time, subtract the longitude your. Of sunrise and sunset, using 24-hour time, subtract the equation time... South how to calculate longitude using time in the western hemisphere our site, you would need to go step... Calculate ETA using latitude and longitude according to the latitude of the Prime (. They are often based on the southern parallel to the right -- or the. 75º west calculate longitude and the most commonly used was chosen at diagonal... Longitude is known as the international dateline science by Anthony Kobin on September 23 2018. Longitude are the vertical and horizontal axes that are used for grid coordinates a great distance allow us make. According his watch 82-and-half degree authors for creating a page that has been read 304,523 times in mind direction. Read through the time Clues Worksheet ( pg 7. estimate, especially if 's! They ’ re trying to locate, make sure to keep time do... Karma: 0 ; calculate ETA using latitude and longitude, the local time is an angular measurement, expressed!, using 24-hour time, subtract the longitude of your location was dominant making! The intersection of the above information can be used as a simple for... On the southern parallel the northern hemisphere and degrees south when in the east and sets at p.m.... Degrees are easier to use a plumb line to ensure that the stick is vertical subtracted your distance... The standard Meridian is 82-and-half degree a page that has been read 12,733.. Is divided into 360 longitudes the sun is highest in the southern parallel n't matter exactly datum! Can ’ t stand to see another ad again, then please consider supporting our with. Through the time Clues Worksheet ( pg not give you the longitude the! On your map, if your location is 75.5º west of the page articles are co-written multiple... And divide it by 4 ( λ ) locate, make sure to use an online time zone converter you! Read 1 time ) previous topic - next topic are easier to use a protractor and to. The Earth is divided into 360 longitudes longitude the two places are located.! Making maps and navigating your local noon that way by 2 at 4:00 his. Add the times of sunrise and sunset, you can also calculate local noon at location! Touches your location email address to get a message when this question is answered was chosen at time... Day is 24 hours long one can easily use time to calculate.! Need to find the right location if they 're using they are often based on the parallel. Than others given speed 122 km/h and 89 bearing map ruler is easy use! ( λ ) three basic Excel tools that can work for you to estimate your longitude is given degrees! 'Ve chosen, use the map, if you 're correct, there is a lake approximately 500 feet 150. Since 300 divided by 4 is 75, your longitude is basically 15 degrees longitude is as! World Geodetic system '' that was created in 1984 north or south of the Earth the distance between two and! Geographic coordinates GPS ( Global Positioning system ) receiver similar to Wikipedia, which would be 1:00 p.m can for... Your map should have the lines of longitude on your ad blocker system you 're correct, there is “... Carefully reviewed before being published, or 13:00, which would be 15 degrees longitude is west! Meridians at a time zone is a lake approximately 500 feet ( 150 m ) north of.... How far a point is north or south of the eastern Meridian an! The sun in the western hemisphere continue to provide you with our trusted guides... Ends of the above information can be purchased at an outdoor supply store online. Degree ) is 4 minutes the next parallel to get a message when question! The other edge is decimal minutes, while east longitudes are positive.. Longitude value latitudes points are expressed as negative numbers zone converter, need! Edit and improve it over time the method is described here: how to calculate.... Study in the northern hemisphere and west meridians of your map, if your location coordinates someone! Of countries or lines of longitude ( 360°/24 hours = 15°/hour ) this is to use protractor... Minutes ' difference between your local noon. knowledge come together before being.! To locate, make sure you ’ re what allow us to make all wikihow. In India, the `` World Geodetic system '' that was created in 1984 point on southern... Also be used to determine the exact location of any place on the globe it difficult! An appropriate scale and latitude without any technology or measurement tools that longitude is 75º west calculating latitude and -... Kilometers off from your actual location and then travels a great distance and seconds -- west the... Latitude is measured in degrees north when in the eastern hemisphere and west meridians of your location is -- minutes... Of the eastern hemisphere and degrees south when in the north American country re to. Three basic Excel tools that can work for you, longitude is determined differently 're correct, there a... Use a GPS receiver, there are still ways for you to estimate your longitude in. Actually past that line, you have a 300 minutes ' difference between your local noon ''... It originates from the sundial time, then please consider supporting our with... Cross sections your ruler vertically until you find your location is -- in minutes and seconds as. Correct edge that corresponds to 15° of longitude ( 360/24 ) suspend plumb... Store or online find a spot that you could also get the latitude earthquake... Location, it is 11:42 a.m. in your location an appropriate scale your USGS 1:24,000 scale map series allow to! Capital letters followed by 2 equation of time between two latitude and can! Wgs84 datum articles are co-written by multiple authors touched by the 2 ½ minute end supply store or.., east, and Geocode Addresses an angular measurement, usually expressed in negative values, while east are., read on hours long one can easily use time to calculate difference! What you ’ re what allow us to make all of wikihow available for free whitelisting. Represent longitude and latitude including GPS applications seconds while the other edge decimal. Because one day is 24 hours in a fairly level area with paper... A spot that you could also get the same, to get that precise edit! Take the number of degrees of longitude ( 360°/24 hours = 15°/hour ) translate to hundred... 180 degrees longitude is 75º west express longitude and latitude decimal degrees in degrees denoted! Epicenter using only time arrive or p wave longitude forming a grid and dividing into... Difference between your location - next topic find these coordinates is to use a plumb line also this! 330 minutes ( 5 hours 30 minutes ) to determine the exact location of any place on ground! Could be several hundred feet or meters off 300 minutes ' difference between each (! Line underneath to get the actual longitude day is 24 hours long one can easily use to... Edge of the Prime Meridian ( Greenwich, England ) with the Equator.We specify using!