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12 minutes in seconds7/11/2023 Longitude accuracy improves nearer the polesĪs the longitude lines are closer together. Accuracy assumes the earth circumference around the equator is 40075.16km. Higher accuracy 5 decimal places output added. The output decimal number is displayed negative, indicating degrees west. This calculator is copyright (c) 2005 - 2021 Satellite Signals LtdĪmended 5 October 2006: If you input a negative number for the whole degrees it assumes you are West Longitude and considers the minutesĪnd seconds parts (input without minus signs) as taking you further to the west. Remote islands tend to have their ownĭatums referenced to a local mountain top.Īny problems or comments, or reports of copyright infringement, please e-mail me Eric Johnston The assumed shape of the earth, equatorial diameter, polar diameter etc may vary slightly according to the assumptions made. The physical location might be a trig point on aĬonvenient mountain top. Your GPS receiver configuration may allow one of many alternative datums to be selected.Ī map datum comprises a physical location with an associated pair of lat/long figures, plus a mathematical model of the shape of the earth. The datum called WGS84 is common, but on many older paper mapsĭifferent local datums are used. Maps then you should check that the coordinate systems used are based on the same datum. If the calculator does not work, you need to enable javascript in your browser.Īccuracy: If you notice significant discrepancies between your lat/long location as shown using Google maps compared with GPS readout or physical paper Three alternative answers are provided, the first to 4 decimal places (accuracy 11m distance on the equator), the third to 6 decimal places (accuracyġ1cm distance on the equator). The answer should be 117.4974 decimal degrees. Test by clicking to calculate the result with the default numbers. The display into decimal degrees like 117.4974 degrees, then you do not need to use this calculator. Investigate your GPS options and if you can get On many GPS receivers it is possible to switch the latitude-longitude display settings format. Numbers in all three blue boxes above in the same manner as shown with the default numbers. If you have a GPS receiver display like 117 degrees and 29 minutes and 50.5 seconds then put the In this case use the first two blue boxesĪbove and put figure 0 (i.e. If you have a GPS receiver the display may be Longitude 117 degrees and 29.842 minutes. Reverse process: Input decimal degrees and the result is given in deg/min/sec format. Minutes divided by 60, plus seconds divided by 3600 The calculation equation is simply: Decimal degrees = whole number of degrees, plus Overwrite the default numbers in the blue boxes below with the latitude Line of sight, azimuth angle bearing and great circle distance calculatorĭegrees, Minutes, Seconds calculator to Decimal Degrees and vice-versa.
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