Web API Reference | MapGuide Open Source

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GetAzimuth
GetAzimuth
GetCoordinate
GetCoordinate
GetDistance
GetDistance
GetEnvelope
virtual double MgCoordinateSystemMeasure::GetAzimuth | ( | double | x1,
|  | double | y1,
|  | double | x2,
|  | double | y2 |
| ) |  |  | `[pure virtual]`
Computes the angle with respect to the north of a vector formed by two coordinates. .NET Syntax
`virtual double GetAzimuth(double lon1, double lat1, double lon2, double lat2);`
Java Syntax
`virtual double GetAzimuth(double lon1, double lat1, double lon2, double lat2);`
PHP Syntax
`virtual double GetAzimuth(double lon1, double lat1, double lon2, double lat2);`
  Parameters:
  | x1 | (double) The x value in coordinate system units of the first coordinate.
  | y1 | (double) The y value in coordinate system units of the first coordinate.
  | x2 | (double) The x value in coordinate system units of the second coordinate.
  | y2 | (double) The y value in coordinate system units of the second coordinate.
Returns: Returns the azimuth (Angle with respect to the North) of the vector formed by (lon1, lat1) and (lon2, lat2). Example (PHP) (-74.806394, 40.714169) is New York City, and (-71.061342, 42.355892) is Boston, Massachusetts. $azimuth12 is 58.507421025167, and $azimuth21 = -119.00856518347.
     $azimuth12 = $coordSysMeasure->GetAzimuth(-74.806394, 40.714169, -71.061342, 42.355892);
     $azimuth21 = $coordSysMeasure->GetAzimuth(-71.061342, 42.355892, -74.806394, 40.714169);
Example (C#)
     using OSGeo.MapGuide;
     private MgCoordinateSystemMeasure geogCSMeasure;
     private double geogCSX = -160.101421317;
     private double geogCSY = 22.0234263273;
     private double geogCSX1 = -159.721535121256;
     private double geogCSY1 = 24.0028259520524;
     private double geogCSAzimuth = 10.0;
     private double azimuth;
     private double tolerance = 0.001;
     private Boolean isEquivalent;

     azimuth = geogCSMeasure.GetAzimuth(geogCSX, geogCSY, geogCSX1, geogCSY1);
     // azimuth has the value of geogCSDistance
     isEquivalent = Math.Abs(azimuth - geogCSAzimuth) < tolerance;
  Exceptions:
  | MgCoordinateSystemMeasureFailedException |

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