docs: @Pure
  	public static Point2d L93_L1(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_1_N,
  				LAMBERT_1_C,
  				LAMBERT_1_XS,
  				LAMBERT_1_YS);
  	}