Vocabulary
BODC parameter semantic model physical entity datum names
| URI | http://vocab.nerc.ac.uk/collection/S20/current/ |
|---|---|
| Description | Controlled vocabulary defining the terms that may be used to describe the reference with respect to which a physical entity (part of the what theme) in the BODC parameter. semantic model is specified. |
| Creator | British Oceanographic Data Centre |
| Modified | 2024-11-06 |
| Version Info | 16 |
| Identifier | S20 |
| Register Manager | British Oceanographic Data Centre |
| Register Owner | British Oceanographic Data Centre |
| See Also | https://github.com/nvs-vocabs/S20 |
| License | https://creativecommons.org/licenses/by/4.0/ |
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Members
| ID ↑ | Preferred Label ↑ | Definition ↑ | Date ↑ |
|---|---|---|---|
| S2000024 | 1 micropascal | The reference level is a pressure of 1 micropascal. | 2019-10-14 |
| S2000022 | 1900-01-01T00:00:00Z | The time reference is midnight UTC on the 1st January 1900. | 2019-03-26 |
| S2000018 | 1950-01-01T00:00:00Z | The time reference is midnight UTC on the 1st January 1950. | 2019-03-26 |
| S2000019 | 1970-01-01T00:00:00Z | The time reference is midnight UTC on the 1st January 1970. | 2019-03-26 |
| S2000040 | Alicante Mean Sea Level datum | A vertical datum based on the mean sea level at Alicante, Spain (Nivel Medio del Mar en Alicante NMMA) | 2024-11-01 |
| S2000036 | Chart Datum | An unspecified chart datum. | 2024-11-01 |
| S2000017 | Irish Grid Reference System | A geographic grid reference system used in Ireland based on 1965 Datum and the Airy Modified Ellipsoid. | 2019-02-01 |
| S2000027 | Lowest Astronomical Tide datum | A vertical datum based on the arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; e.g. monthly mean sea level and yearly mean sea level. Adapted from https://tidesandcurrents.noaa.gov/datum_options.html | 2024-04-23 |
| S2000038 | Mean Sea Level datum | A vertical datum based on the arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; e.g. monthly mean sea level and yearly mean sea level. Adapted from https://tidesandcurrents.noaa.gov/datum_options.html | 2024-04-23 |
| S2000034 | Mean Water Height | Not available | 2024-04-23 |
| S2000035 | NAP datum | A vertical datum used in large parts of Western Europe. Also known as Amsterdam Ordnance Datum. NAP stands for Normaal Amsterdams Peil. | 2024-04-23 |
| S2000031 | Normal Low Water datum | Not available | 2024-04-23 |
| S2000016 | OSGB36 | The Ordnance Survey Great Britain 1936 datum based on the Airy 1830 ellipsoid. | 2019-02-01 |
| S2000032 | Okioc Reference Level datum | Not available | 2024-04-23 |
| S2000028 | Ordnance Datum Malin | A vertical datum based on the mean sea level of the tide gauge at Malin Head, County Donegal. It was adopted as the national datum in 1970 from readings taken between 1960 and 1969 and all heights on national grid maps are measured above this datum. | 2024-04-23 |
| S2000037 | Ordnance Datum Newlyn | A vertical datum based on the mean sea level at Newlyn in Cornwall averaged between 1915 and 1921 used for the elevation of the zero metres contour on UK Ordnance Survey maps. | 2024-04-23 |
| S2000029 | Rijkswaterstaat Mean Sea Level | A vertical datum based on the mean sea level for a period of minimal 2 days converted to a many-year average based on measurements taken at the specified location. | 2024-04-23 |
| S2000002 | True North | The entity is defined relative to the direction towards the geographic North Pole. | 2018-09-07 |
| S2000030 | UK Admiralty Chart Datum | A vertical datum based on the low water plane specified by UK Admiralty. This approximates to Lowest Astonomical Tide but the two are not exactly the same in some geographical areas. | 2024-04-23 |
| S2000015 | WGS84 | The World Geodetic System 1984 datum. | 2019-01-22 |
| S2000009 | averaged sea level | The entity is defined relative to the sea surface elevation averaged over the duration of the observation. | 2018-09-27 |
| S2000006 | bed surface | The entity is defined relative to the surface of the bed of a water body. | 2018-09-07 |
| S2000041 | datum specified elsewhere | A datum provided elsewhere in the data model. | 2024-11-01 |
| S2000011 | ground surface | The entity is defined relative to the solid surface of the earth. | 2018-09-27 |
| S2000010 | instantaneous sea level | The sea surface elevation at the time of the observation. | 2024-11-01 |
| S2000025 | instrument | The reference is a physical object that is a tool, an implement or a sampling/measuring device. | 2021-08-02 |
| S2000026 | instrument and True North | The entity is defined relative to the instrument (e.g. a radar) and True North for direction. | 2021-08-02 |
| S2000042 | instrument frame | The reference is the rigid structure of a physical object that is a tool, an implement or a sampling/measuring device. | 2024-11-05 |
| S2000023 | last reading set | The reference is the time of the last reading set. | 2019-03-26 |
| S2000012 | magnetic north | The entity is defined relative to the direction indicated by a magnetic needle or compass. | 2018-09-28 |
| S2000008 | mean sea level | The entity is defined relative to the sea surface elevation averaged over a long period of time which approximates to the Earth's geoid. | 2018-09-27 |
| S2000013 | moving platform | The entity is defined relative to the platform from which the measurement is made. | 2018-10-01 |
| S2000004 | moving platform and True North | The entity is defined relative to the moving platform (e.g. a ship) for speed and True North for direction. | 2018-09-07 |
| S2000003 | moving platform and heading | The entity is defined relative to the moving platform (e.g. a ship). | 2018-09-07 |
| S2000001 | not applicable | This semantic element is not required for the parameter being described. | 2017-06-15 |
| S2000039 | relative to instrument zero | The measurement is given relative to the instrument's zero. | 2024-04-23 |
| S2000007 | sea level | The entity is defined relative to the sea surface elevation averaged over a period long enough to eliminate tidal signals. | 2018-09-27 |
| S2000020 | start of day 00:00:00 UT | The time reference is midnight UTC at the start of the day. | 2019-03-26 |
| S2000021 | start of dive | The reference is the start of the platform dive. | 2019-03-26 |
| S2000033 | unspecified datum | A datum that has not been specified. | 2024-11-01 |
| S2000014 | water | The measurement is defined relative to the water as in, for example, speed through water. | 2018-10-02 |
| S2000005 | water surface | The entity is defined relative to the surface of a water body. | 2018-09-07 |
