private String getProjection() {
        switch (cbProj.getSelectedIndex()) {
            case 0:
                return FlatGlobe.PROJECTION_LAT_LON;
            case 1:
                return FlatGlobe.PROJECTION_MERCATOR;
            case 2:
                return FlatGlobe.PROJECTION_SINUSOIDAL;
            case 3:
                return FlatGlobe.PROJECTION_MODIFIED_SINUSOIDAL;
        }
        throw new AssertionError();
    }