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Great Circle Calculator. By Ed Williams. You need Javascript enabled if you want this page to do anything useful! For Netscape, it's under Options/Network Preferences/Languages. Compute true course and distance between points. Enter lat/lon of points, select distance units and earth model and click "compute".
- Ed Williams' Aviation Page
Ed Williams' Aviation page. My 182 . My aviation formulary...
- Ed Williams' Aviation Page
18 sty 2024 · In our great circle calculator, we went for the WGS 84: a widespread model used even by GPS satellites. Here are the numbers: a = 6378137.8 m. a = 6 378 137.8\ \mathrm {m} a = 6378137.8 m; b ≈ 6356752.314140 m. b \approx 6 356 752.314140\ \mathrm {m} b ≈ 6356752.314140 m; and. f = 298.257223563.
Great-circle distance between two points. Enter the co-ordinates into the text boxes to try out the calculations. A variety of formats are accepted, principally: deg-min-sec suffixed with N/S/E/W (e.g. 40°44′55″N, 73 59 11W), or. signed decimal degrees without compass direction, where negative indicates west/south (e.g. 40.7486, -73.9864):
The Great Circle Mapper. Draw you flight path on a map and calculate the great circle distance in nautical miles and kilometers. Get estimated flight time by choosing an aircraft type or entering the cruising speed.Click in the large textfield above to enter all the airports of your flight route!
Distance Output Earth model: Spherical (1'=1nm) WGS84/NAD83/GRS80 Clarke (1866)/NAD27 International Krasovsky Bessel (1841) WGS72 WGS66 FAI sphere User defined
The great circle distance d between two points with coordinates {lat1,lon1} and {lat2,lon2} is given by: d=acos (sin (lat1)*sin (lat2)+cos (lat1)*cos (lat2)*cos (lon1-lon2)) A mathematically equivalent formula, which is less subject to rounding error for short distances is:
Calculate the great circle distance between two addresses. Draw a direct route between two airports, or multiple airport pairs. Draw range rings (concentric circles) around a point. Calculate coordinates at a given bearing and distance. Coordinate Converter.
