How to use

ucar.unidata.geoloc.projection.sat.MSGnavigation

constructor

/**
 * copy constructor - avoid clone !!
 */
@Override
public ProjectionImpl constructCopy() {
 return new MSGnavigation(lat0, lon0, 1000 * major_axis, 1000 * minor_axis, 1000 * sat_height, scale_x, scale_y);
}

@Override
public ProjectionImpl constructCopy() {
 ProjectionImpl result =  new MSGnavigation(
     lat0, Math.toDegrees(lon0), 1000 * major_axis, 1000 * minor_axis, 1000 * sat_height, scale_x, scale_y);
 result.setDefaultMapArea(defaultMapArea);
 result.setName(name);
 return result;
}

@Override
public ProjectionImpl constructCopy() {
 ProjectionImpl result =  new MSGnavigation(
     lat0, Math.toDegrees(lon0), 1000 * major_axis, 1000 * minor_axis, 1000 * sat_height, scale_x, scale_y);
 result.setDefaultMapArea(defaultMapArea);
 result.setName(name);
 return result;
}

@Override
public ProjectionImpl constructCopy() {
 ProjectionImpl result =  new MSGnavigation(lat0, lon0, 1000 * major_axis, 1000 * minor_axis, 1000 * sat_height, scale_x, scale_y);
 result.setDefaultMapArea(defaultMapArea);
 result.setName(name);
 return result;
}

@Test
public void testMSG() {
 doOne(new MSGnavigation(), 60, 60, true);
 testProjection(new MSGnavigation());
 MSGnavigation m = new MSGnavigation();
 showProjVal(m, 0, 0);
 showProjVal(m, 60, 0);
 showProjVal(m, -60, 0);
 showProjVal(m, 0, 60);
 showProjVal(m, 0, -60);
 }

attributes.add(new Attribute("scale_y", new Double(scale_y)));
proj = new MSGnavigation(Lat0, Lon0, major_axis, minor_axis, nr * major_axis, scale_x, scale_y);

public CoordinateTransform makeCoordinateTransform(NetcdfDataset ds, Variable ctv) {
 double lon0 = readAttributeDouble( ctv, CF.LONGITUDE_OF_PROJECTION_ORIGIN, Double.NaN);
 double lat0 = readAttributeDouble( ctv, CF.LATITUDE_OF_PROJECTION_ORIGIN, Double.NaN);
 double minor_axis = readAttributeDouble( ctv, CF.SEMI_MINOR_AXIS, Double.NaN);
 double major_axis = readAttributeDouble( ctv, CF.SEMI_MAJOR_AXIS, Double.NaN);
 double height = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.HEIGHT_FROM_EARTH_CENTER, Double.NaN);
 double scale_x = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.SCALE_X, Double.NaN);
 double scale_y = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.SCALE_Y, Double.NaN);
 //ProjectionImpl proj = new ucar.unidata.geoloc.projection.sat.MSGnavigation(lat0, lon0, major_axis, minor_axis, height, scale_x, scale_y);
 ProjectionImpl proj = new ucar.unidata.geoloc.projection.sat.MSGnavigation(lat0, lon0, minor_axis, major_axis, height, scale_x, scale_y);  // LOOK WTF?
 return new ProjectionCT(ctv.getShortName(), "FGDC", proj);
}

public CoordinateTransform makeCoordinateTransform(NetcdfDataset ds, Variable ctv) {
 double lon0 = readAttributeDouble( ctv, CF.LONGITUDE_OF_PROJECTION_ORIGIN, Double.NaN);
 double lat0 = readAttributeDouble( ctv, CF.LATITUDE_OF_PROJECTION_ORIGIN, Double.NaN);
 double minor_axis = readAttributeDouble( ctv, CF.SEMI_MINOR_AXIS, Double.NaN);
 double major_axis = readAttributeDouble( ctv, CF.SEMI_MAJOR_AXIS, Double.NaN);
 double height = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.HEIGHT_FROM_EARTH_CENTER, Double.NaN);
 double scale_x = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.SCALE_X, Double.NaN);
 double scale_y = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.SCALE_Y, Double.NaN);
 ProjectionImpl proj = new ucar.unidata.geoloc.projection.sat.MSGnavigation(lat0, lon0, major_axis, minor_axis, height, scale_x, scale_y);
 return new ProjectionCT(ctv.getShortName(), "FGDC", proj);
}

public ProjectionCT makeCoordinateTransform(AttributeContainer ctv, String geoCoordinateUnits) {
 double lon0 = readAttributeDouble( ctv, CF.LONGITUDE_OF_PROJECTION_ORIGIN, Double.NaN);
 double lat0 = readAttributeDouble( ctv, CF.LATITUDE_OF_PROJECTION_ORIGIN, Double.NaN);
 double minor_axis = readAttributeDouble( ctv, CF.SEMI_MINOR_AXIS, Double.NaN);
 double major_axis = readAttributeDouble( ctv, CF.SEMI_MAJOR_AXIS, Double.NaN);
 double height = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.HEIGHT_FROM_EARTH_CENTER, Double.NaN);
 double scale_x = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.SCALE_X, Double.NaN);
 double scale_y = readAttributeDouble( ctv, ucar.unidata.geoloc.projection.sat.MSGnavigation.SCALE_Y, Double.NaN);
 ProjectionImpl proj = new ucar.unidata.geoloc.projection.sat.MSGnavigation(lat0, lon0, major_axis, minor_axis, height, scale_x, scale_y);
 return new ProjectionCT(ctv.getName(), "FGDC", proj);
}

MSGnavigation proj = new MSGnavigation(LaP, LoP, majorAxis, minorAxis, Nr * majorAxis, scale_x, scale_y);
return new GdsHorizCoordSys(getNameShort(), template, getOctet4(7), scanMode, proj, startx, incrx, starty, incry,
    getNxRaw(), getNyRaw(), getNptsInLine());

  @Test
  public void testConstructCopy() throws Exception {
    // These are the same as the values used in MSGnavigation() except for the 2nd, lon0. For the purposes of
    // this test, that's the only argument I care about.
    MSGnavigation msgNav =
        new MSGnavigation(0.0, 180, R_EQ, R_POL, SAT_HEIGHT, SAT_HEIGHT - R_EQ, SAT_HEIGHT - R_EQ);

    Assert.assertEquals(Math.PI, msgNav.getLon0(), 1e-6);  // 180° = π radians.

    // The 2 tests below failed prior to TDS-575 being fixed.

    MSGnavigation msgNavCopy1 = (MSGnavigation) msgNav.constructCopy();
    Assert.assertEquals(Math.PI, msgNavCopy1.getLon0(), 1e-6);  // 180° = π radians.

    MSGnavigation msgNavCopy2 = (MSGnavigation) msgNavCopy1.constructCopy();
    Assert.assertEquals(Math.PI, msgNavCopy2.getLon0(), 1e-6);  // 180° = π radians.
  }
}