private IDictionary <short, IDataElementBasic> ReadFields(IMap map, ref string iso)
        {
            IDictionary <short, IDataElementBasic> activeValues = new Dictionary <short, IDataElementBasic>();

            foreach (var activeBit in _bitmapManager.GetActiveBits())
            {
                activeValues.Add(activeBit, ReadField(map[activeBit], ref iso));
            }


            return(activeValues);
        }