Torgue ha scritto:
> Wikipedia:
> For example, moving clockwise on a 360° degree circle, a point due east
> would have an azimuth of 90°, south 180°, and west 270°.
>
> Example for a south direction:
>
> GeodeticCalculator calc = new GeodeticCalculator();
> calc.setStartingGeographicPoint(0,0);
> calc.setDestinationGeographicPoint(-1,0);
>
> double azimuth = calc.getAzimuth();
>
> Result: -90.0 but should be 180
The result is correct. The API is clear:
/**
* Set the destination point in geographic coordinates. The azimuth
and distance values
* will be updated as a side effect of this call. They will be
recomputed the next time
* {...@link #getAzimuth()} or {...@link #getOrthodromicDistance()} are
invoked.
*
* @param longitude The longitude in decimal degrees between -180
and +180°
* @param latitude The latgitude in decimal degrees between -90
and +90°
* @throws IllegalArgumentException if the longitude or the
latitude is out of bounds.
*
* @since 2.3
*/
public void setDestinationGeographicPoint(double longitude, double
latitude)
throws IllegalArgumentException
(-1, 0) is west of (0,0)
Cheers
Andrea
--
Andrea Aime
OpenGeo - http://opengeo.org
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