@Pure
	public static Point2d L93_L4(double x, double y) {
		final Point2d ntfLambdaPhi = NTFLambert_NTFLambdaPhi(x, y,
				LAMBERT_93_N,
				LAMBERT_93_C,
				LAMBERT_93_XS,
				LAMBERT_93_YS);
		return NTFLambdaPhi_NTFLambert(
				ntfLambdaPhi.getX(), ntfLambdaPhi.getY(),
				LAMBERT_4_N,
				LAMBERT_4_C,
				LAMBERT_4_XS,
				LAMBERT_4_YS);
	}
@ Pure public static Point2d L93_L4 ( double x , double y ) { final Point2d ntfLambdaPhi = NTFLambert_NTFLambdaPhi ( x , y , LAMBERT_93_N , LAMBERT_93_C , LAMBERT_93_XS , LAMBERT_93_YS ) ; return NTFLambdaPhi_NTFLambert ( ntfLambdaPhi . getX ( ) , ntfLambdaPhi . getY ( ) , LAMBERT_4_N , LAMBERT_4_C , LAMBERT_4_XS , LAMBERT_4_YS ) ; }
This function convert France Lambert 93 coordinate to
France Lambert IV coordinate.

@param x is the coordinate in France Lambert 93
@param y is the coordinate in France Lambert 93
@return the France Lambert IV coordinate.