Line data    Source code

       1             : //# SpectralImageUtil.cc: Spectral Image Utilities
       2             : //# Copyright (C) 2013
       3             : //# Associated Universities, Inc. Washington DC, USA.
       4             : //#
       5             : //# This library is free software; you can redistribute it and/or modify it
       6             : //# under the terms of the GNU Library General Public License as published by
       7             : //# the Free Software Foundation; either version 2 of the License, or (at your
       8             : //# option) any later version.
       9             : //#
      10             : //# This library is distributed in the hope that it will be useful, but WITHOUT
      11             : //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12             : //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
      13             : //# License for more details.
      14             : //#
      15             : //# You should have received a copy of the GNU Library General Public License
      16             : //# along with this library; if not, write to the Free Software Foundation,
      17             : //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
      18             : //#
      19             : //# Correspondence concerning AIPS++ should be adressed as follows:
      20             : //#        Internet email: casa-feedback@nrao.edu.
      21             : //#        Postal address: AIPS++ Project Office
      22             : //#                        National Radio Astronomy Observatory
      23             : //#                        520 Edgemont Road
      24             : //#                        Charlottesville, VA 22903-2475 USA
      25             : //#
      26             : //#
      27             : //# $Id$
      28             : #include <casacore/casa/aips.h>
      29             : #include <casacore/images/Images/SubImage.h>
      30             : 
      31             : #include <casacore/coordinates/Coordinates/CoordinateSystem.h>
      32             : #include <casacore/coordinates/Coordinates/DirectionCoordinate.h>
      33             : #include <casacore/coordinates/Coordinates/SpectralCoordinate.h>
      34             : #include <casacore/coordinates/Coordinates/StokesCoordinate.h>
      35             : #include <casacore/coordinates/Coordinates/Projection.h>
      36             : #include <casacore/casa/Logging/LogSink.h>
      37             : #include <casacore/casa/Logging/LogMessage.h>
      38             : 
      39             : #include <imageanalysis/Utilities/SpectralImageUtil.h>
      40             : 
      41             : #include <iostream>
      42             : using namespace casacore;
      43             : namespace casa {
      44             :   
      45             : 
      46           0 :   Double SpectralImageUtil::worldFreq(const CoordinateSystem& cs, Double spectralpix){
      47             :     ///freq part
      48           0 :     Int spectralIndex=cs.findCoordinate(Coordinate::SPECTRAL);
      49             :     SpectralCoordinate
      50             :       spectralCoord=
      51           0 :       cs.spectralCoordinate(spectralIndex);
      52           0 :     Vector<String> units(1); units = "Hz";
      53           0 :     spectralCoord.setWorldAxisUnits(units);     
      54           0 :     Vector<Double> spectralWorld(1);
      55           0 :     Vector<Double> spectralPixel(1);
      56           0 :     spectralPixel(0) = spectralpix;
      57           0 :     spectralCoord.toWorld(spectralWorld, spectralPixel);  
      58           0 :     Double freq  = spectralWorld(0);
      59           0 :     return freq;
      60           0 :   }
      61             : 
      62             : } //#End casa namespace