Package org.osgeo.proj4j.proj

Examples of org.osgeo.proj4j.proj.Projection

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     * @return a geographic CoordinateReferenceSystem based on the datum of this CRS
     */
    public CoordinateReferenceSystem createGeographic()
    {
        Datum datum = getDatum();
        Projection geoProj = new LongLatProjection();
        geoProj.setEllipsoid(getProjection().getEllipsoid());
        geoProj.setUnits(Units.DEGREES);
        geoProj.initialize();
        return new CoordinateReferenceSystem("GEO-" + datum.getCode(), null, datum, geoProj);
    }
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    Datum datum = datumParam.getDatum();
    Ellipsoid ellipsoid = datum.getEllipsoid();
    // TODO: this makes a difference - why?
    // which is better?
//    Ellipsoid ellipsoid = datumParam.getEllipsoid();
    Projection proj = parseProjection(params, ellipsoid);
    return new CoordinateReferenceSystem(name, args, datum, proj);
  }
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/**
  * Creates a {@link Projection}
  * initialized from a PROJ.4 argument list.
  */
private Projection parseProjection( Map params, Ellipsoid ellipsoid ) {
   Projection projection = null;

   String s;
   s = (String)params.get( Proj4Keyword.proj );
   if ( s != null ) {
     projection = registry.getProjection( s );
     if ( projection == null )
       throw new InvalidValueException( "Unknown projection: "+s );
   }

   projection.setEllipsoid(ellipsoid);
  
   //TODO: better error handling for things like bad number syntax. 
   // Should be able to report the original param string in the error message
   // Should the exception be lib-specific?  (e.g. ParseException)
  
   s = (String)params.get( Proj4Keyword.alpha );
   if ( s != null )
     projection.setAlphaDegrees( Double.parseDouble( s ) );
  
   s = (String)params.get( Proj4Keyword.lonc );
   if ( s != null )
     projection.setLonCDegrees( Double.parseDouble( s ) );
  
   s = (String)params.get( Proj4Keyword.lat_0 );
   if ( s != null )
     projection.setProjectionLatitudeDegrees( parseAngle( s ) );
  
   s = (String)params.get( Proj4Keyword.lon_0 );
   if ( s != null )
     projection.setProjectionLongitudeDegrees( parseAngle( s ) );
  
   s = (String)params.get( Proj4Keyword.lat_1 );
   if ( s != null )
     projection.setProjectionLatitude1Degrees( parseAngle( s ) );
  
   s = (String)params.get( Proj4Keyword.lat_2 );
   if ( s != null )
     projection.setProjectionLatitude2Degrees( parseAngle( s ) );
  
   s = (String)params.get( Proj4Keyword.lat_ts );
   if ( s != null )
     projection.setTrueScaleLatitudeDegrees( parseAngle( s ) );
  
   s = (String)params.get( Proj4Keyword.x_0 );
   if ( s != null )
     projection.setFalseEasting( Double.parseDouble( s ) );
  
   s = (String)params.get( Proj4Keyword.y_0 );
   if ( s != null )
     projection.setFalseNorthing( Double.parseDouble( s ) );

   s = (String)params.get( Proj4Keyword.k_0 );
   if ( s == null )
     s = (String)params.get( Proj4Keyword.k );
   if ( s != null )
     projection.setScaleFactor( Double.parseDouble( s ) );

   s = (String)params.get( Proj4Keyword.units );
   if ( s != null ) {
     Unit unit = Units.findUnits( s );
     // TODO: report unknown units name as error
     if ( unit != null ) {
       projection.setFromMetres( 1.0 / unit.value );
       projection.setUnits( unit );
     }
   }
  
   s = (String)params.get( Proj4Keyword.to_meter );
   if ( s != null )
     projection.setFromMetres( 1.0/Double.parseDouble( s ) );

   if ( params.containsKey( Proj4Keyword.south ) )
     projection.setSouthernHemisphere(true);

   //TODO: implement some of these parameters ?
    
   // this must be done last, since behaviour depends on other params being set (eg +south)
   if (projection instanceof TransverseMercatorProjection) {
     s = (String) params.get(Proj4Keyword.zone);
     if (s != null)
       ((TransverseMercatorProjection) projection).setUTMZone(Integer
           .parseInt(s));
   }

   projection.initialize();

   return projection;
}
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Related Classes of org.osgeo.proj4j.proj.Projection

  • org.osgeo.proj4j.CoordinateReferenceSystem
  • org.osgeo.proj4j.parser.Proj4Parser
  • org.osgeo.proj4j.units.AngleFormat
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