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For any question on data and metadata, please contact: Eurostat user support |
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1.1. Contact organisation | Statistics Netherlands / Centraal Bureau voor de Statistiek (CBS) |
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1.2. Contact organisation unit | Department of traffic and transport |
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1.5. Contact mail address |
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2.1. Metadata last certified | 10/01/2024 | ||
2.2. Metadata last posted | 10/01/2024 | ||
2.3. Metadata last update | 10/01/2024 |
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3.1. Data description | |||
Maritime transport data refer to gross weight of goods (in tonnes), passenger movements (in number of passengers) as well as for vessel traffic (in number of vessels and in gross tonnage of vessels). |
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3.2. Classification system | |||
The following classifications are applicable: Maritime Coastal area: the nomenclature is based on the Geonomenclature (the country nomenclature for the external trade statistics of the Community and statistics of trade between Member States, originally drawn up by the Council Regulation (EEC) N°1736/75) in force in the year to which the data refer (RAMON: https://showvoc.op.europa.eu/#/datasets/ESTAT_Geonomenclature_2021_%28GEONOM_2021%29/data). Ports: the codes used are the official UN/LOCODEs, when they exist. If a port does not have an official UN/LOCODE a provisional (numeric) code is attributed to the port. As soon as an official UN/LOCODE is attributed by the United Nations Economic Commission for Europe (UNECE) to the port at the request of the competent national authority, the provisional (numeric) code is replaced by the final official one. In exceptional cases (see for example one-port transport or special aggregation for minor ports) permanent numeric codes are attributed to special locations or activities. The code list of UN/LOCODE is available by country through the following link: http://www.unece.org/cefact/locode/service/location.html. According to the relevant directive, Eurostat draws up a list of ports, coded and classified according to countries and maritime coastal areas. The list of ports is included in implementing legal acts and as such is published in the Official Journal of the European Union (the "official" list). The most recent list of ports published in the Official Journal is found in Commission Decision (EU) 2018/1007 Nationality of registration of vessels: the nomenclature used is the Geo-nomenclature (the country nomenclature for the external trade statistics of the Community and statistics of trade between Member States, originally drawn up by the Council Regulation (EEC) N°1736/75) in force in the year to which the data refer (RAMON: https://showvoc.op.europa.eu/#/datasets/ESTAT_Geonomenclature_2021_%28GEONOM_2021%29/data). The type of ship classification is harmonised with an internationally agreed International Classification of Ship by Type (ICST). The type of cargo classification, available in Directive 2009/42/EC, has been established in conformity with the United Nation ECE Recommendation N°21. |
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3.3. Coverage - sector | |||
Maritime transport statistics concerns the carriage of goods and passengers by sea-going vessels, on voyages undertaken wholly or partly at sea. The data collected from the National Institute of Statistics are port statistics: information on goods handled in ports, passengers embarked and disembarked and vessel traffic. Detailed information is collected on the type of cargo and passengers, geographical areas where the partner ports are located, type, size and nationality of ships used to carry out that transportation. |
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3.4. Statistical concepts and definitions | |||
Main concepts used in this domain are the following and for more information on the concepts and methodology, please consult the Reference Manual on Maritime Transport Statistics.
Port -A place having facilities for merchant ships to moor and to load and/or unload cargo or to disembark and/or embark passengers to or from vessels, usually directly to a pier.
Bunkers and stores supplied to vessels shall be excluded from the scope. Seagoing vessel -Floating marine structure with one or more surface displacement hulls. In the context of the Directive, sea-going vessels are vessels other than those which navigate exclusively in inland waters or in waters within, or closely adjacent to, sheltered waters or areas where port regulations apply. Swap bodies are excluded. Although without internal volume flats used in maritime transport should be considered to be a special type of container and therefore are included here. For a fuller description, reference should be made to ISO 668 and 1496.The related term "container cargo" refers to containers, with or without cargo, which are lifted on or off the vessels which carry them by sea. Ro-Ro unit- This means wheeled equipment for carrying cargo, such as a truck, trailer or semi-trailer, which can be driven or towed onto a vessel. Port or ships' trailers are included in this definition. Classifications should follow United Nations ECE Recommendation No 21 'Codes for types of cargo, packages and packaging materials'. Live animals on the hoof are included. Vehicles being transported as cargo as opposed to a means of transport for freight are recorded in the separate headings of the Ro-Ro cargo classification, when they are rolled on or rolled off a vessel on their own wheels.
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3.5. Statistical unit | |||
The data used in the domain are collected at port level. |
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3.6. Statistical population | |||
Detailed data are provided for ports handling more than one million tonnes of goods or recording more than 200 000 passenger movements annually (Main ports). The other ports are required to provide summary data. However, detailed data may be included also for minor ports on a voluntary basis. |
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3.7. Reference area | |||
The Netherlands |
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3.8. Coverage - Time | |||
The data are available from 1996. |
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3.9. Base period | |||
Not applicable. |
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The units used depend on the variables collected within each data set and are: gross weight of goods expressed in thousands of tonnes; number of passengers in thousands, number of vessels.
TEUs: Twenty feet equivalent units, expressed in units or in thousands depending on the table. TEU calculation coefficients: |
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Quarters for datasets A1, A2, C1, D1 and F2. |
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6.1. Institutional Mandate - legal acts and other agreements | |||
National Level: European Level:
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6.2. Institutional Mandate - data sharing | |||
Not applicable. |
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7.1. Confidentiality - policy | |||
National level: European level:
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7.2. Confidentiality - data treatment | |||
Article 4 of Commission Decision 2001/423/EC mention that: "the highest level of detail in which data may be published or disseminated is the level of port to and from maritime coastal area. The Commission may however publish at more aggregate level if the quality and/or completeness of information are not appropriate in such detail." |
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8.1. Release calendar | |||
Maritime transport statistics is published quarterly, within five months after the reference quarter. Maritime Transport data are disseminated in the datawarehouse Statline on the website of Statistics Netherlands: www.cbs.nl. |
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8.2. Release calendar access | |||
The release calendar is publicly accessible on the website: https://www.cbs.nl/en-gb/publication-calendar. |
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8.3. Release policy - user access | |||
Main results of maritime transport statistics are available free of charge to all users. For more detailed results the data user has to pay for accessing the data. |
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Datasets A1, A2, C1, D1 and F2 are transmitted to Eurostat quarterly. These datasets and the remaining datasets are also transmitted to Eurostat annually. Quarterly maritime transport statistics are published within 10 months after the reference period and annual maritime transport statistics within 16 months after the reference period on the website of Eurostat. |
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10.1. Dissemination format - News release | |||
The results are published quarterly, five quarters after the reference quarter, on the website of Statistics Netherlands www.cbs.nl (https://opendata.cbs.nl/statline/#/CBS/nl/navigatieScherm/thema). |
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10.2. Dissemination format - Publications | |||
Publication of maritime transport statistics (figures) is done through Statline, the datawarehouse on our website (https://opendata.cbs.nl/statline/#/CBS/nl/navigatieScherm/thema). Articles are published on our main website www.cbs.nl. |
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10.3. Dissemination format - online database | |||
The results can be found in the datawarehouse Statline (https://opendata.cbs.nl/statline/#/CBS/nl/dataset/00374hvv/table?dl=EF75) (Statistics > Verkeer en Vervoer > Vervoer personen en goederen > Vervoer over water). |
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10.4. Dissemination format - microdata access | |||
Not applicable to maritime transport statistics. |
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10.5. Dissemination format - other | |||
Open data access is available for the main results of maritime transport statistics. |
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10.6. Documentation on methodology | |||
Methodological notes are available in the online Statistics Explained articles on Maritime transport statistics and in the Reference Manual on Maritime Transport Statistics. |
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10.7. Quality management - documentation | |||
A description of the methodology used for the maritime transport statistics can be found on our website: https://www.cbs.nl/nl-nl/onze-diensten/methoden/onderzoeksomschrijvingen/korte-onderzoeksbeschrijvingen/zeevaart. This description is at the moment only available in Dutch. |
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11.1. Quality assurance | |||
The system follows as far as possible the European Statistics Code of practice and Quality Assurance Framework of the European Statistical System, more precisely Principle 4: Commitment to Quality: |
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11.2. Quality management - assessment | |||
There is a set of validation rules and quality checks put in place, which detect various types of issues. In case of any issues detected, Statistics Netherland deals with these issues or the data providers are contacted to provide explanations or/and revise the data accordingly. Checks for the consistency over times are prepared and revised as well and the results are compared with aggragated data sended by the ports to Statistics Netherlands. The weakness of the data is the amount of detail needed for Eurostat. Due to regulations in The Netherlands, customs don't recieve all relevant data Statistics Netherlands needs for the statistics for Eurostat, especially for the outgoing transport within Europe. Other datasources are used to fill these gaps, but not all the detailed data can be obtained. Quarterly and annually, Eurostat provides a data quality report with a summary of the main findings affecting quality as well as showing the solution adopted and the materiality of the existing differences. Mirror checks and checks for the consistency over times are prepared as well. If there are any inconsistencies Statistics Netherlands provides an explanation which is included in the Country Specific Notes (CSNs) available at Eurostat’s metadata page. |
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12.1. Relevance - User Needs | |||
The main users of Maritime Transport Statistics are national and local authorities, universities, research institutes, port authorities and trade associations in the transport, environment and energy sectors. |
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12.2. Relevance - User Satisfaction | |||
Statistics Netherlands is interested in understanding who the users of the statistics it produces are, what the information needs are, whether they match production and if the statistics produced satisfy users. To this aim Statistics Netherlands is constantly in contact with key users of the statistics (especially with national authorities and port authorities) discussing results and new needs from both sides.
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12.3. Completeness | |||
All data requested by Regulation 1090/2010 and Directive 2009/42/EC are transmitted. In some cases the outgoing direction is missing detailed information (especially ports and goods). |
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13.1. Accuracy - overall | |||
The overall accuracy is considered to be good. When data are compared with other sources, such as data compiled by local port authorities, discrepancies are usually found to be resulting from differences in the methodology, scope or definitions used in the various data collections. However, some errors may occur in the statistics due to measurement errors or processing errors (see 13.3). Detailed information is sometimes missing. |
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13.2. Sampling error | |||
Not applicable for maritime transport data collection. |
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13.3. Non-sampling error | |||
Measurement errors No estimates of measurement errors are available. However, some measurement errors may occur as a result of codification errors by customs, port authorities, shipping agents and other respondents. A share of so-called “unknown codes” instead of specific codes for type of cargo, type of goods, partner port, etc. is also a factor which will reduce the accuracy of the maritime statistics on a more detailed level. Editing and imputation procedures are used to correct for measurement errors as much as possible. Processing errors Between data collection and the beginning of statistical analysis for the production of statistics, data must undergo a certain processing: metadata validation, data editing, linking with registers, etc. In addition, The Netherlands needs to combine several data sources available on national level, to obtain good total figures and more detailed information (espacially ports and goods). |
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14.1. Timeliness | |||
Quarterly data should be transmitted by Member States to Eurostat within five months of the end of the period of observation; annual data within eight months. The Commission (Eurostat) shall disseminate appropriate statistical data with a periodicity comparable to that of the results transmitted (Directive 2009/42/EC). |
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14.2. Punctuality | |||
The deadlines for transmission are usually met. |
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15.1. Comparability - geographical | |||
Geographical comparability is obtained via the application of common concepts and validation rules. The harmonised interpretation of the methodology is enhanced by the organisation of regular meeting of the Working Group on Maritime Transport Statistics, where all reporting countries are represented. |
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15.2. Comparability - over time | |||
As from 2011 the statistics on maritime transport in the Netherlands are comparable over time, as the data is collected in the same way and the data is produced by the same production process and methodology. Time series checks are regularly made to detect inconsistencies in the data. |
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15.3. Coherence - cross domain | |||
Comparisons with other transport statistics are only done partially and to a limited extent, since data are not collected at the same level of detail, different methods are used and underlying objectives are different. |
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15.4. Coherence - internal | |||
The quality checks include intra-dataset checks, inter-dataset checks, time series checks and comparisons with overviews from port authorities. These quality checks detect data that could possibly be in error. Some errors are corrected before publication of the quarterly data. Other errors, which require further investigations, are corrected later and are published with the annual data. |
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The response burden is put on the customs, the four main ports in the Netherlands and ferry companies operating in the Netherlands, but is reduced to a minimum. The customs, the ports and the ferry companies provide the data (almost) automatically via a data interface or via email and are only contacted if errors cannot be solved by Statistics Netherlands. |
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17.1. Data revision - policy | |||
The results are published quarterly and annualy. Revision of the results may be required if for example the production process will be revised. In case of any data change in the statistics, after the annual data is finalised, an explanation for the change is given in the table published on the national website. |
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17.2. Data revision - practice | |||
The datasets transmitted quarterly to Eurostat are (normally) revised once when the annual results are being transmitted. In 2023 The Netherlands finalized the revision of their production process for the maritime statistics. At this moment the data from 2021 are revised and send to Eurostat. In 2024 the data from 2015 till 2020 will be revised. |
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18.1. Source data | |||
Statistics Netherlands is using administrative data from the Customs and the main port authorities to compile the maritime transport statistics. Next to that a direct survey is sended to ferry companies operating in The Netherlands to gather more detailed information about the vehicles and passengers on the ferries between the Netherlands and (mainly) the UK. |
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18.2. Frequency of data collection | |||
Information needed for the maritime transport statistics are collected on a montly basis and processed on quarterly basis. |
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18.3. Data collection | |||
The data transmission is possible via a secure fttp-port or via email. |
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18.4. Data validation | |||
Data validation procedure : Validation of port codes, IMO numbers of vessels, goods codes, 'unknown' codes. Actions taken when errors are detected:
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18.5. Data compilation | |||
After various recodings, plausibility checks, the data received from the customs, the port authorities and the ferry companies are compiled into quarterly data following the structure of the data sets which are preset by the regulation.
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18.6. Adjustment | |||
Not applicable for maritime transport data collection. |
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No comments. |
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