def __parse(self):
        """
        Parse
        Accept the text file. We'll open it, read it, and return a compiled dictionary to write to a json file
        May write a chronology CSV and a data CSV if those sections are available
        :return:
        """
        logger_noaa_lpd.info("enter parse")

        # Strings
        missing_str = ''
        data_filename = ''

        # Counters
        grant_id = 0
        funding_id = 0
        data_col_ct = 1
        line_num = 0

        # Boolean markers
        description_on = False
        publication_on = False
        abstract_on = False
        site_info_on = False
        chronology_on = False
        chron_vals_on = False
        variables_on = False
        data_vals_on = False
        data_on = False

        # Lists
        lat = []
        lon = []
        elev = []
        pub = []
        funding = []
        temp_abstract = []
        temp_description = []
        data_var_names = []
        data_col_list = []
        data_tables = []

        # All dictionaries needed to create JSON structure
        temp_funding = OrderedDict()
        temp_pub = OrderedDict()
        core_len = OrderedDict()
        geo_properties = OrderedDict()
        chron_dict = OrderedDict()
        data_dict_upper = OrderedDict()
        final_dict = OrderedDict()

        try:
            # Open the text file in read mode. We'll read one line at a time until EOF
            with open(self.filename_txt, 'r') as f:
                logger_noaa_lpd.info("opened noaa file: {}".format(self.filename_txt))
                for line in iter(f):
                    line_num += 1

                    # PUBLICATION
                    # There can be multiple publications. Create a dictionary for each one.
                    if publication_on:
                        # End of the section. Add the dictionary for this one publication to the overall list
                        if '-----' in line:
                            temp_pub = self.__reorganize_doi(temp_pub)
                            pub.append(temp_pub.copy())
                            temp_abstract.clear()
                            temp_pub.clear()
                            publication_on = False
                            logger_noaa_lpd.info("end section: Publication")
                        elif abstract_on:
                            # End of abstract: possibly more variables after.
                            if "#" in line:
                                abstract_on = False
                                temp_pub['abstract'] = ''.join(temp_abstract)
                                logger_noaa_lpd.info("end section: Abstract")
                                line = self.__str_cleanup(line)
                                key, value = self.__slice_key_val(line)
                                temp_pub[self.__camel_case(key)] = value
                            else:
                                temp_abstract.append(self.__str_cleanup(line))

                        # Add all info into the current publication dictionary
                        else:
                            line = self.__str_cleanup(line)
                            key, value = self.__slice_key_val(line)
                            if key in ("Author", "Authors"):
                                temp_pub["author"] = self.__reorganize_authors(value)
                            else:
                                temp_pub[self.__camel_case(key)] = value
                                if key == 'Abstract':
                                    logger_noaa_lpd.info("reading section: Abstract")
                                    abstract_on = True
                                    temp_abstract.append(value)

                    # DESCRIPTION AND NOTES
                    # Descriptions are often long paragraphs spanning multiple lines, but don't follow the key/value format
                    elif description_on:

                        # End of the section. Turn marker off and combine all the lines in the section
                        if '-------' in line:
                            description_on = False
                            value = ''.join(temp_description)
                            final_dict['description'] = value
                            logger_noaa_lpd.info("end section: Description_and_Notes")

                        # The first line in the section. Split into key, value
                        elif 'Description:' in line:
                            key, val = self.__slice_key_val(line)
                            temp_description.append(val)

                        # Keep a running list of all lines in the section
                        else:
                            line = self.__str_cleanup(line)
                            temp_description.append(line)

                    # SITE INFORMATION (Geo)
                    elif site_info_on:

                        if '-------' in line:
                            site_info_on = False
                            logger_noaa_lpd.info("end section: Site_Information")

                        else:
                            line = self.__str_cleanup(line)
                            key, value = self.__slice_key_val(line)
                            if key.lower() in ["northernmost_latitude", "southernmost_latitude"]:
                                lat.append(self.__convert_num(value))

                            elif key.lower() in ["easternmost_longitude", "westernmost_longitude"]:
                                lon.append(self.__convert_num(value))

                            elif key.lower() in ["site_name", "location", "country", "elevation"]:
                                if key.lower() == 'elevation':
                                    val, unit = self.__split_name_unit(value)
                                    elev.append(val)
                                else:
                                    geo_properties[self.__camel_case(key)] = value

                    # CHRONOLOGY
                    elif chronology_on:
                        """
                        HOW IT WORKS:
                        Chronology will be started at "Chronology:" section header
                        Every line starting with a "#" will be ignored
                        The first line without a "#" is considered the variable header line. Variable names are parsed.
                        Each following line will be considered column data and sorted accordingly.
                        Once the "-----" barrier is reached, we exit the chronology section.
                        """
                        # When reaching the end of the chron section, set the marker to off and close the CSV file
                        if '-------' in line:
                            # Turn off markers to exit section
                            chronology_on = False
                            chron_vals_on = False
                            try:
                                # If nothing between the chronology start and the end barrier, then there won't be a CSV
                                if chron_start_line != line_num - 1:
                                    try:
                                        chron_csv.close()
                                        logger_noaa_lpd.info("parse: chronology: no data found in chronology section")
                                    except NameError:
                                        logger_noaa_lpd.debug(
                                            "parse: chronology_on: NameError: chron_csv ref before assignment, {}".format(
                                                self.filename_txt))
                                        print(
                                            "Chronology section is incorrectly formatted. "
                                            "Section data will not be converted")

                                logger_noaa_lpd.info("end section: Chronology")
                            except NameError:
                                logger_noaa_lpd.debug(
                                    "parse: chronology_on: NameError: chron_start_line ref before assignment, {}".format(
                                        self.filename_txt))
                                print("Chronology section is incorrectly formatted. Section data will not be converted")

                        # Data values line. Split, then write to CSV file
                        elif chron_vals_on:
                            values = line.split()
                            try:
                                cw.writerow(values)
                            except NameError:
                                logger_noaa_lpd.debug(
                                    "parse: chronology_on: NameError: csv writer ref before assignment, {}".format(
                                        self.filename_txt))
                                print("Chronology section is incorrectly formatted. Section data will not be converted")

                        else:
                            try:
                                # Chron variable headers line
                                if line and line[0] != "#":
                                    chron_filename = self.dsn + '.chron1.measurementTable1.csv'
                                    # Organize the var header into a dictionary
                                    variables = self.__reorganize_chron_header(line)

                                    # Create a dictionary of info for each column
                                    chron_col_list = self.__create_chron_cols(variables)
                                    chron_dict['filename'] = chron_filename
                                    chron_dict['chronTableName'] = 'Chronology'
                                    chron_dict['columns'] = chron_col_list

                                    # Open CSV for writing
                                    csv_path = os.path.join(self.dir_bag, chron_filename)
                                    chron_csv = open(csv_path, 'w+', newline='')
                                    logger_noaa_lpd.info("opened csv file: {}".format(chron_filename))
                                    cw = csv.writer(chron_csv)
                                    # Turn the marker on to start processing the values columns
                                    chron_vals_on = True
                            except IndexError:
                                logger_noaa_lpd.debug("parse: chronology: IndexError when attempting chron var header")

                    # VARIABLES
                    elif variables_on:
                        """
                        HOW IT WORKS:
                        Variable lines are the only lines that have a "##" in front of them.
                        Ignore all lines that don't match the "##" regex.
                        Once there's a match, start parsing the variable lines, and create a column entry for each line.
                        """
                        process_line = False
                        # End of the section. Turn marker off
                        if "------" in line:
                            variables_on = False
                            logger_noaa_lpd.info("end section: Variables")
                        for item in NOAA_VAR_LINES:
                            if item.lower() in line.lower():
                                process_line = False
                        for item in NOAA_EMPTY:
                            if item == line:
                                process_line = False
                        m = re.match(re_var, line)
                        if m:
                            process_line = True

                        # If the line isn't in the ignore list, then it's a variable line
                        if process_line:

                            # Split the line items, and cleanup
                            cleaned_line = self.__separate_data_vars(line)

                            # Add the items into a column dictionary
                            data_col_dict = self.__create_paleo_col(cleaned_line, data_col_ct)

                            # Keep a list of all variable names
                            try:
                                # Use this list later to cross check with the variable line in the Data section
                                data_var_names.append(data_col_dict['variableName'])
                            except KeyError:
                                data_var_names.append('')
                                logger_noaa_lpd.warn("parse: variables: "
                                                     "KeyError: {} not found in {}".format("variableName", "data_col_dict"))
                            # Add the column dictionary into a final dictionary
                            data_col_list.append(data_col_dict)
                            data_col_ct += 1

                    # DATA
                    # Missing Value, Create data columns, and output Data CSV
                    elif data_on:
                        """
                        HOW IT WORKS:
                        Capture the "Missing Value" entry, if it exists.
                        Data lines should not have a "#" in front of them.
                        The first line without a "#" should be the variable header line
                        All lines that follow should have column data.
                        """
                        # Do not process blank or template lines
                        process_line = True
                        for item in NOAA_DATA_LINES:
                            if item in line:
                                process_line = False
                        for item in NOAA_EMPTY:
                            if item == line:
                                process_line = False
                        for item in ALTS_MV:
                            # Missing value found. Store entry
                            if item in line.lower():
                                process_line = False
                                line = self.__str_cleanup(line)
                                key, missing_str = self.__slice_key_val(line)

                        if process_line:
                            # Split the line at each space (There SHOULD one space between each variable. Not always true)
                            values = line.split()
                            # Write all data values to CSV
                            if data_vals_on:
                                try:
                                    dw.writerow(values)
                                except NameError:
                                    logger_noaa_lpd.debug(
                                        "parse: data_on: NameError: csv writer ref before assignment, {}".format(
                                            self.filename_txt))

                            # Check for the line of variables
                            else:
                                var = self.__str_cleanup(values[0].lstrip())
                                # Check if a variable name is in the current line
                                if var.lower() in line.lower():
                                    data_vals_on = True
                                    logger_noaa_lpd.info("start section: Data_Values")
                                    # Open CSV for writing
                                    data_filename = "{}.paleoData1.measurementTable1.csv".format(self.dsn)
                                    csv_path = os.path.join(self.dir_bag, data_filename)
                                    data_csv = open(csv_path, 'w+', newline='')
                                    logger_noaa_lpd.info("opened csv file: {}".format(data_filename))
                                    dw = csv.writer(data_csv)

                    # METADATA
                    else:
                        # Line Continuation: Sometimes there are items that span a few lines.
                        # If this happens, we want to combine them all properly into one entry.
                        if '#' not in line and line not in NOAA_EMPTY and old_val:
                            if old_key in ('funding', 'agency'):
                                try:
                                    temp_funding[old_key] = old_val + line
                                except KeyError as e:
                                    logger_noaa_lpd.debug(
                                        "parse: metadata: line continuation: {} not found in {}, {}".format(old_key,
                                                                                                            "temp_funding",
                                                                                                            e))
                            else:
                                try:
                                    final_dict[old_key] = old_val + line
                                except KeyError as e:
                                    logger_noaa_lpd.debug(
                                        "parse: metadata: line continuation: {} not found in {}, {}".format(old_key,
                                                                                                            "temp_funding",
                                                                                                            e))

                        # No Line Continuation: This is the start or a new entry
                        else:
                            line = self.__str_cleanup(line)

                            # Grab the key and value from the current line
                            try:
                                # Split the line into key, value pieces
                                key, value = self.__slice_key_val(line)
                                l_key = key.lower()
                                cc_key= self.__camel_case(key)

                                # If there is no value, then we are at a section header.
                                # Data often has a blank value, so that is a special check.
                                if not value or l_key == 'data':
                                    # Turn on markers if we run into section headers
                                    if l_key == 'description_and_notes':
                                        description_on = True
                                        logger_noaa_lpd.info("reading section: Description_and_Notes")
                                    elif l_key == 'publication':
                                        publication_on = True
                                        logger_noaa_lpd.info("reading section: Publication")
                                    elif l_key == 'site_information':
                                        site_info_on = True
                                        logger_noaa_lpd.info("reading section: Site_Information")
                                    elif l_key == 'chronology':
                                        chronology_on = True
                                        logger_noaa_lpd.info("reading section: Chronology")
                                        chron_start_line = line_num
                                    elif l_key == 'variables':
                                        variables_on = True
                                        logger_noaa_lpd.info("reading section: Variables")
                                    elif l_key == 'data':
                                        data_on = True
                                        logger_noaa_lpd.info("reading section: Data")
                                # For all
                                else:
                                    # Ignore any entries that are specified in the skip list
                                    _ignore = [item.lower() for item in NOAA_KEYS_BY_SECTION["Ignore"]]
                                    if l_key not in _ignore:
                                        # There can be multiple funding agencies and grants. Keep a list of dict entries
                                        _funding = [item.lower() for item in NOAA_KEYS_BY_SECTION["Funding_Agency"]]
                                        if l_key in _funding:
                                            if l_key == 'funding_agency_name':
                                                funding_id += 1
                                                key = 'agency'
                                            elif l_key == 'grant':
                                                grant_id += 1
                                                key = 'grant'
                                            temp_funding[key] = value
                                            # If both counters are matching, we are ready to add content to the funding list
                                            if grant_id == funding_id:
                                                funding.append(temp_funding.copy())
                                                temp_funding.clear()
                                        else:
                                            # There's likely two "Online_Resource"s, and we need both, so check and concat
                                            if cc_key == "onlineResource":
                                                # If it exists, append. If not, add entry as a list
                                                if cc_key in final_dict:
                                                    final_dict[cc_key].append(value)
                                                else:
                                                    final_dict[cc_key] = [value]
                                            else:
                                                final_dict[cc_key] = value
                                        # Keep track of old key in case we have a line continuation
                                        old_key = key
                                        old_val = value.strip()
                            except TypeError as e:
                                logger_noaa_lpd.warn(
                                    "parse: TypeError: none type received from slice_key_val, {}".format(e))

            # Wait to close the data CSV until we reached the end of the text file
            try:
                data_csv.close()
                logger_noaa_lpd.info("end section: Data_Values")
                logger_noaa_lpd.info("end section: Data")
            except NameError as e:
                print("Error: NOAA text file is contains format errors. Unable to process.")
                logger_noaa_lpd.debug(
                    "parse: NameError: failed to close csv, invalid formatting in NOAA txt file, {}".format(e))

            # Piece together measurements block
            logger_noaa_lpd.info("compiling final paleoData")
            data_dict_upper['filename'] = data_filename
            data_dict_upper['paleoDataTableName'] = 'Data'
            data_dict_upper['missingValue'] = missing_str
            data_dict_upper['columns'] = data_col_list
            data_tables.append(data_dict_upper)

            # Piece together geo block
            logger_noaa_lpd.info("compiling final geo")
            geo = self.__create_coordinates(lat, lon, elev)
            geo['properties'] = geo_properties

            # Piece together final dictionary
            logger_noaa_lpd.info("compiling final master")
            final_dict['pub'] = pub
            final_dict['funding'] = funding
            final_dict['geo'] = geo
            final_dict['coreLength'] = core_len
            final_dict['chronData'] = [{"chronMeasurementTable": chron_dict}]
            final_dict['paleoData'] = data_tables
            self.metadata = final_dict
            logger_noaa_lpd.info("final dictionary compiled")

            # Start cleaning up the metadata
            logger_noaa_lpd.info("removing empty fields")
            self.metadata = rm_empty_fields(self.metadata)
            logger_noaa_lpd.info("removing empty doi")
            self.metadata = rm_empty_doi(self.metadata)
            logger_noaa_lpd.info("removing irrelevant keys")
            self.__remove_irr_fields()

        except Exception as e:
            logger_noaa_lpd.debug("parse: {}".format(e))

        logger_noaa_lpd.info("exit parse")
        return