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Asked: 2026-05-11T15:15:56+00:00

I’d like to use Google maps static API to display a map with a

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I’d like to use Google maps static API to display a map with a path overlay indicating a boundary.

AFAICT the static API doesn’t support polygons, so I intend to circumvent this by drawing the boundary using paths.

To do this I need to determine the points to draw the straight lines (paths) between; so I’d like an algorithm that returns the geographic location (i.e. WGS84 coordinates) a given bearing and distance from a known point.

Can anyone point me to such an algorithm. Preferably in C#, but other languages are acceptable?

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1 Answer

  1. Found this (here: http://williams.best.vwh.net/avform.htm#LL):

    A point {lat,lon} is a distance d out on the tc radial from point 1 if:

    lat=asin(sin(lat1)*cos(d)+cos(lat1)*sin(d)*cos(tc)) IF (cos(lat)=0)     lon=lon1      // endpoint a pole ELSE     lon=mod(lon1-asin(sin(tc)*sin(d)/cos(lat))+pi,2*pi)-pi ENDIF

    Will the radial be in radians or degrees?

    Edit:

    radians = degrees * PI / 180

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