GeoPoint bearingTo

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Martin Preishuber

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Aug 4, 2010, 2:05:26 PM8/4/10
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Hi,

here's code for a bearingTo method (similar to distanceTo) for the
GeoPoint class:

---

public double bearingTo(final GeoPoint other)
{
final double lat1 = Math.toRadians(this.mLatitudeE6 / 1E6);
final double long1 = Math.toRadians(this.mLongitudeE6 / 1E6);
final double lat2 = Math.toRadians(other.mLatitudeE6 / 1E6);
final double long2 = Math.toRadians(other.mLongitudeE6 / 1E6);
final double delta_long = long2 - long1;

final double a = Math.sin(delta_long) * Math.cos(lat2);
final double b = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1)
* Math.cos(lat2) * Math.cos(delta_long);
final double bearing = Math.toDegrees(Math.atan2(a, b));
final double bearing_normalized = (bearing + 360) % 360;

return bearing_normalized;
}

---

regards,

Martin

--
Martin Preishuber <martin.p...@digiforge.at>

Neil

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Aug 5, 2010, 10:42:58 AM8/5/10
to osmdroid
Thanks for that Martin.

I've added it, plus some tests.

Neil


On Aug 4, 8:05 pm, "Martin Preishuber"
> Martin Preishuber <martin.preishu...@digiforge.at>
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