code: @Pure
  	public static boolean isESRINaN(double value) {
  		return Double.isInfinite(value) || Double.isNaN(value) || value <= ESRI_NAN;
  	}
docs: Replies if the given value is assumed to be NaN according to the
  ESRI specifications.
  
  @param value the value.
  @return <code>true</code> if the value corresponds to NaN, otherwise <code>false</code>.