Woods Hole Science Center

Javascript Great Circle Calculator.

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Compute true course and distance between points.

Enter lat/lon of points, select distance units and earth model and click "compute". Lat/lons may be entered in DD.DD, DD:MM.MM or DD:MM:SS.SS formats.

Input Data
Lat1		Lon1

Lat2		Lon2

Output
Course 1-2	Course 2-1	Distance

Distance Units: Earth model:

Compute lat/lon given radial and distance from a known point

Enter lat/lon of initial point, true course and distance. Select distance units and earth model and click "compute". Lat/lons may be entered in DD.DD, DD:MM.MM or DD:MM:SS.SS formats.

Input data
Lat1		Lon1

Course 1-2		Distance 1-2

Output
Lat2		Lon2

Distance Units: Earth model:

Spheroid

Enter "user defined" spheroid parameters here:

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URL: woodshole.er.usgs.gov/staffpages/cpolloni/manitou/ccal.htm
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Page Last Modified: Wednesday, 02-May-2007 15:21:22 EDT