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DATUM REFERENCE

  • Datum reference
  • Point of reference against which some others are calculated

    A datum reference or just datum (plural: datums) is some geometrically important part of an object, such as a point, line, plane, hole, set of holes,

    Datum reference

    Datum reference

    Datum_reference

  • Geodetic datum
  • Reference frame for measuring location

    geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame)

    Geodetic datum

    Geodetic datum

    Geodetic_datum

  • Vertical datum
  • Reference surface for vertical positions

    geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such as

    Vertical datum

    Vertical datum

    Vertical_datum

  • Reference datum height
  • In aviation, reference datum height (RDH) is the height of a point, located above the intersection of the runway centre line and the threshold, through

    Reference datum height

    Reference_datum_height

  • Geometric dimensioning and tolerancing
  • System for defining and representing engineering tolerances

    or more 'datum references' which indicate measurements that should be made with respect to the corresponding datum feature. The datum reference frame can

    Geometric dimensioning and tolerancing

    Geometric dimensioning and tolerancing

    Geometric_dimensioning_and_tolerancing

  • North American Vertical Datum of 1988
  • Vertical datum for orthometric heights

    American Datum of 1983 (NAD 83, a horizontal datum), is set to be replaced in 2025 with a new geometric reference frame and geopotential datum, based on

    North American Vertical Datum of 1988

    North American Vertical Datum of 1988

    North_American_Vertical_Datum_of_1988

  • North American Datum
  • Reference frame for geodesy on the continent

    American Datums are in use: the North American Datum of 1927 (NAD 27) and the North American Datum of 1983 (NAD 83). Both are geodetic reference systems

    North American Datum

    North American Datum

    North_American_Datum

  • Ordnance datum
  • Vertical datum used as the basis for deriving altitudes on maps

    An ordnance datum (OD) is a vertical datum used by an Ordnance Survey as the basis for deriving altitudes on maps. A spot height may be expressed as above

    Ordnance datum

    Ordnance datum

    Ordnance_datum

  • National Geodetic Vertical Datum of 1929
  • Vertical datum in the United States

    National Geodetic Vertical Datum of 1929 (NGVD29), originally known as the Sea Level Datum of 1929, is the vertical datum established for vertical control

    National Geodetic Vertical Datum of 1929

    National Geodetic Vertical Datum of 1929

    National_Geodetic_Vertical_Datum_of_1929

  • Chart datum
  • Level of water from which depths displayed on a nautical chart are measured

    heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. Common chart datums are lowest astronomical

    Chart datum

    Chart datum

    Chart_datum

  • Frame of reference
  • Abstract coordinate system

    Centripetal force Classical mechanics Coriolis force Curvilinear coordinates Datum reference Dynamics (physics) Frenet–Serret formulas Galilean invariance General

    Frame of reference

    Frame_of_reference

  • Reference (computer science)
  • Data type which allows a program to indirectly access a particular value in memory

    The reference is said to refer to the datum, and accessing the datum is called dereferencing the reference. A reference is distinct from the datum itself

    Reference (computer science)

    Reference_(computer_science)

  • Amsterdam Ordnance Datum
  • Vertical datum

    NAP markers in Amsterdam Amsterdam Ordnance Datum or Normaal Amsterdams Peil (NAP) is a vertical datum in use in large parts of Western Europe. Originally

    Amsterdam Ordnance Datum

    Amsterdam Ordnance Datum

    Amsterdam_Ordnance_Datum

  • South American Datum
  • The South American Datum (SAD) is a regional historical geodetic datum for South America. The most common version was established in 1969 (SAD69), as

    South American Datum

    South American Datum

    South_American_Datum

  • World Geodetic System
  • Geodetic reference system

    the large geodetic systems, such as European Datum (ED50), North American Datum (NAD), and Tokyo Datum (TD), to provide a worldwide geo-data basis Need

    World Geodetic System

    World Geodetic System

    World_Geodetic_System

  • Military Grid Reference System
  • NATO global coordinate reference system

    position reported in a modern datum usually cannot be misunderstood as using an old datum, and vice versa – provided the datums use different MGRS lettering

    Military Grid Reference System

    Military Grid Reference System

    Military_Grid_Reference_System

  • Geographic coordinate system
  • System to specify locations on Earth

    altitude. Both types of datum bind a mathematical model of the shape of the earth (usually a reference ellipsoid for a horizontal datum, and a more precise

    Geographic coordinate system

    Geographic coordinate system

    Geographic_coordinate_system

  • National Spatial Reference System
  • NAD 83 & NAVD 88 based National Geodetic Coordinate System

    National Spatial Reference System (NSRS). It will replace the North American Datum of 1983 (NAD 83) and the North American Vertical Datum of 1988 (NAVD 88)

    National Spatial Reference System

    National Spatial Reference System

    National_Spatial_Reference_System

  • European Terrestrial Reference System 1989
  • Geodetic reference frame fixed to the Eurasian Plate

    Collilieux ETRS89 is the EU-recommended frame of reference for geodata for Europe. It is the only geodetic datum to be used for mapping and surveying purposes

    European Terrestrial Reference System 1989

    European Terrestrial Reference System 1989

    European_Terrestrial_Reference_System_1989

  • Earth-centered, Earth-fixed coordinate system
  • 3-D coordinate system centered on the Earth

    2010. ECEF datum transformation Archived March 22, 2007, at the Wayback Machine Notes on converting ECEF coordinates to WGS-84 datum Datum Transformations

    Earth-centered, Earth-fixed coordinate system

    Earth-centered, Earth-fixed coordinate system

    Earth-centered,_Earth-fixed_coordinate_system

  • Spatial reference system
  • System to specify locations on Earth

    Vertical reference frame A standard reference system for measuring elevation using vertical datums, based on levelling, a geoid model, or a chart datum (considering

    Spatial reference system

    Spatial reference system

    Spatial_reference_system

  • Datum (disambiguation)
  • Topics referred to by the same term

    item of data. Datum reference, in carpentry, metalworking, needlework, geometric dimensioning and tolerancing Vertical datum, reference surface for vertical

    Datum (disambiguation)

    Datum_(disambiguation)

  • Earth ellipsoid
  • Geometric figure which approximates the Earth's shape

    applications, a geodesic reference ellipsoid is the mathematical model used as foundation by spatial reference system or geodetic datum definitions. In geophysics

    Earth ellipsoid

    Earth ellipsoid

    Earth_ellipsoid

  • Geographic coordinate conversion
  • Overview of GPS conversion formulas

    projections all referenced to the same geodetic datum. A geographic coordinate transformation is a translation among different geodetic datums. Both geographic

    Geographic coordinate conversion

    Geographic_coordinate_conversion

  • Elevation
  • Height of a geographic location above a fixed reference point

    sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum). The term elevation is mainly used when referring to points on

    Elevation

    Elevation

    Elevation

  • .45 ACP
  • Pistol cartridge designed by J.M. Browning

    pistol. The cartridge headspaces on the mouth of the case at the L3 datum reference. According to Commission internationale permanente pour l'épreuve des

    .45 ACP

    .45 ACP

    .45_ACP

  • Height above mean sea level
  • Elevation of a location above a standardized sea level

    location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized

    Height above mean sea level

    Height_above_mean_sea_level

  • SK-42 reference system
  • Soviet geodetic datum

    The SK-42 reference system is a geodetic datum established in the Soviet Union in 1942 as Systema koordinat (Russian: Система координат 1942 года). It

    SK-42 reference system

    SK-42_reference_system

  • Geodesy
  • Science of measuring the shape, orientation, and gravity of Earth

    geodetic datum, ISO speaks of a "coordinate reference system", whereas IERS uses a "reference frame" for the same. The ISO term for a datum transformation

    Geodesy

    Geodesy

    Geodesy

  • Reduced level
  • Surveying terminololgy

    survey points with reference to a common assumed vertical datum. It is a vertical distance between survey point and adopted datum surface. Thus, it is

    Reduced level

    Reduced_level

  • Ordnance Survey National Grid
  • System of geographic grid references used in Great Britain

    maps. A datum transformation exists between GRS36 and more recent geocentric frames (see below). OSGB36 is based on the Airy ellipsoid, a reference ellipsoid

    Ordnance Survey National Grid

    Ordnance Survey National Grid

    Ordnance_Survey_National_Grid

  • Altitude
  • Height in relation to a specified reference point

    vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context (e

    Altitude

    Altitude

    Altitude

  • Geoid
  • Ocean shape without winds and tides

    better data. Deflection of the vertical Geodetic datum Geopotential International Terrestrial Reference Frame Physical geodesy Planetary geoid Areoid (Mars's

    Geoid

    Geoid

    Geoid

  • Normalhöhennull
  • Vertical datum used in Germany

    "standard elevation zero") or NHN is a vertical datum used in Germany. In geographical terms, NHN is the reference plane for the normal height of a topographical

    Normalhöhennull

    Normalhöhennull

    Normalhöhennull

  • Planetary coordinate system
  • Coordinate system for planets

    datum is a generalization of geodetic datums for other planetary bodies, such as the Mars datum; it requires the specification of physical reference points

    Planetary coordinate system

    Planetary coordinate system

    Planetary_coordinate_system

  • Universal Transverse Mercator coordinate system
  • Map projection system

    longitude and latitude. The WGS84 datum has therefore become the implicit default for UTM coordinates as well, if no alternate datum is specified. In North America

    Universal Transverse Mercator coordinate system

    Universal Transverse Mercator coordinate system

    Universal_Transverse_Mercator_coordinate_system

  • EPSG Geodetic Parameter Dataset
  • Registry of geographic reference systems

    Dataset (also EPSG registry) is a public registry of geodetic datums, coordinate reference systems, Earth ellipsoids, coordinate transformations and related

    EPSG Geodetic Parameter Dataset

    EPSG Geodetic Parameter Dataset

    EPSG_Geodetic_Parameter_Dataset

  • Well-known text representation of coordinate reference systems
  • Markup language for representing coordinate reference systems

    coordinate system is related to Earth by the WGS84 geodetic datum: GEODCRS["WGS 84", DATUM["World Geodetic System 1984", ELLIPSOID["WGS 84", 6378137, 298

    Well-known text representation of coordinate reference systems

    Well-known_text_representation_of_coordinate_reference_systems

  • Plumb bob
  • Weighted line used as a vertical reference

    vertical direction as a reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum. It is typically made

    Plumb bob

    Plumb bob

    Plumb_bob

  • Fallingwater
  • House in Stewart Township, Pennsylvania

    and Wright directed Mosher to use one of the boulders on site as a datum reference. By June 1936, workers had completed the access bridge and the footers

    Fallingwater

    Fallingwater

    Fallingwater

  • Sea level
  • Geographical reference point from which various heights are measured

    global MSL is a type of vertical datum – a standardised geodetic datum – that is used, for example, as a chart datum in cartography and marine navigation

    Sea level

    Sea level

    Sea_level

  • Projected coordinate system
  • Cartesian geographic coordinate system

    the datum ellipsoidal coordinates and height onto a flat surface of a map. The datum, along with a map projection applied to a grid of reference locations

    Projected coordinate system

    Projected coordinate system

    Projected_coordinate_system

  • Geodetic Reference System 1980
  • Collection of data on Earth's gravity and shape

    The Geodetic Reference System 1980 (GRS80) consists of a global reference ellipsoid and a normal gravity model. The GRS80 gravity model has been followed

    Geodetic Reference System 1980

    Geodetic Reference System 1980

    Geodetic_Reference_System_1980

  • Geocentric Datum of Australia 1994
  • Australian geodetic reference system

    The Geocentric Datum of Australia 1994 (GDA94) is a geodetic datum covering the Australian continent. Details of this datum are provided by the GDA94 Technical

    Geocentric Datum of Australia 1994

    Geocentric_Datum_of_Australia_1994

  • Luzon Datum of 1911
  • Geodetic center monument of the Philippines

    The Luzon Datum of 1911 was the base for the first modern survey of the Philippine Islands. The execution of the triangulation of the Philippine Islands

    Luzon Datum of 1911

    Luzon Datum of 1911

    Luzon_Datum_of_1911

  • Hellenic Geodetic Reference System 1987
  • datum and a projection system. In some documents it is called Greek Geodetic Reference System 1987 or GGRS87. HGRS87 specifies a non-geocentric datum

    Hellenic Geodetic Reference System 1987

    Hellenic Geodetic Reference System 1987

    Hellenic_Geodetic_Reference_System_1987

  • Regional Reference Frame Sub-Commission for Europe
  • Geodetic Reference Frame. The goal of EUREF is to establish a unified geodetic datum for Europe (ETRS89) and a consistent network of reference stations

    Regional Reference Frame Sub-Commission for Europe

    Regional_Reference_Frame_Sub-Commission_for_Europe

  • Latitude
  • Geographic coordinate specifying north-south position

    latitude. The importance of specifying the reference datum may be illustrated by a simple example. On the reference ellipsoid for WGS84, the centre of the

    Latitude

    Latitude

    Latitude

  • BeiDou
  • Chinese global navigation satellite system

    reached millimeter-level accuracy with post-processing from a nationwide reference station network. Predecessors included BeiDou-1 (first-generation BeiDou)

    BeiDou

    BeiDou

    BeiDou

  • Map projection
  • Systematic representation of the surface of a sphere or ellipsoid onto a plane

    projection (including Mercator and Gall–Peters) for reference maps of the world. Geodetic datum – Reference frame for measuring location Geographic information

    Map projection

    Map projection

    Map_projection

  • Australian Height Datum
  • Vertical datum of Australia

    The Australian Height Datum was introduced in 1971 as the official vertical datum for Australia, and thereby serves as the benchmark to which all height

    Australian Height Datum

    Australian Height Datum

    Australian_Height_Datum

  • Figure of the Earth
  • Size and shape used to model the Earth for geodesy

    the figure of the Earth or other celestial body is called a reference ellipsoid. The reference ellipsoid for Earth is called an Earth ellipsoid. An ellipsoid

    Figure of the Earth

    Figure of the Earth

    Figure_of_the_Earth

  • ED50
  • Reference frame for European geodesy

    ED50 ("European Datum 1950", EPSG:4230) is a geodetic datum which was defined after World War II for the international connection of geodetic networks

    ED50

    ED50

    ED50

  • Earth radius
  • Distance from the Earth surface to a point near its center

    The International Union of Geodesy and Geophysics (IUGG) provides three reference values: the mean radius (R1) of three radii measured at two equator points

    Earth radius

    Earth radius

    Earth_radius

  • Circle of latitude
  • Geographic notion

    Geodetic datum Geodesic Horizontal position representation Latitude / Longitude Map projection Reference ellipsoid Satellite geodesy Spatial reference system

    Circle of latitude

    Circle of latitude

    Circle_of_latitude

  • Earth's circumference
  • Eratosthenes' ratio". Posidonius calculated the Earth's circumference by reference to the position of the star Canopus. As explained by Cleomedes, Posidonius

    Earth's circumference

    Earth's circumference

    Earth's_circumference

  • Sense data
  • Theory in the philosophy of perception

    existence of his red, round and 'somewhat bulgy' sense-datum and his consciousness of this sense-datum. When we twist a coin it 'appears' to us as elliptical

    Sense data

    Sense_data

  • Nautical chart
  • Topographic map of a maritime area and adjacent coastal regions

    horizontal wire. All depths on charts is measured with respect to a datum/reference level. This ensures that difficult to find projections, such as masts

    Nautical chart

    Nautical chart

    Nautical_chart

  • Vertical Offshore Reference Frames
  • UK and Irish hydrographic vertical datum

    (HAT) Land datums including Ordnance Datums Newlyn, Belfast and Poolbeg The surfaces are modelled with respect to the terrestrial reference frame used

    Vertical Offshore Reference Frames

    Vertical Offshore Reference Frames

    Vertical_Offshore_Reference_Frames

  • Newlyn Tidal Observatory
  • British tidal observatory

    observatory between 1915 and 1921 were used to define the reference level, Ordnance Datum Newlyn, for height measurement on the British mainland. The

    Newlyn Tidal Observatory

    Newlyn Tidal Observatory

    Newlyn_Tidal_Observatory

  • Levelling
  • Surveying technique

    points relative to a datum. It is widely used in geodesy and cartography to measure vertical position with respect to a vertical datum, and in construction

    Levelling

    Levelling

    Levelling

  • Tolerance analysis
  • Analysis of variation in mechanical parts and assemblies

    It must: Enter through a joint Follow the datum path to the datum reference frame (DRF) Follow a second datum path leading to another joint Exit to the

    Tolerance analysis

    Tolerance analysis

    Tolerance_analysis

  • Depth in a well
  • Concept in oil and gas exploration

    unit (e.g. m for metre), a path (e.g. MD for measured depth) and the reference or datum they refer to (e.g. RT for rotary table), and none of these three

    Depth in a well

    Depth_in_a_well

  • Wide Area Augmentation System
  • System that enhances the accuracy of GPS receivers

    system (GBAS) in critical areas. WAAS uses a network of ground-based reference stations, in North America and Hawaii, to measure small variations in

    Wide Area Augmentation System

    Wide Area Augmentation System

    Wide_Area_Augmentation_System

  • Indian Regional Navigation Satellite System
  • Satellite navigation system

    experiments for NavIC ground reference station in Japan. ISRO is also under discussion with CNES for a NavIC ground reference station in France. ISRO is

    Indian Regional Navigation Satellite System

    Indian Regional Navigation Satellite System

    Indian_Regional_Navigation_Satellite_System

  • Longitude
  • East-West geographic coordinate

    prime meridian defines 0° longitude; by convention the International Reference Meridian for the Earth passes near the Royal Observatory in Greenwich

    Longitude

    Longitude

    Longitude

  • IERS Reference Meridian
  • International prime meridian used for GPS and other systems

    include the North American Datum 1983 (NAD83), the European Terrestrial Reference Frame 1989 (ETRF89), and the Geocentric Datum of Australia 1994 (GDA94)

    IERS Reference Meridian

    IERS Reference Meridian

    IERS_Reference_Meridian

  • Meades Ranch Triangulation Station
  • United States historic place

    was the reference location for establishing a system of horizontal measurement in the United States, known as geodetic datum. In 1913, the datum was adopted

    Meades Ranch Triangulation Station

    Meades Ranch Triangulation Station

    Meades_Ranch_Triangulation_Station

  • Normalnull
  • Outdated official vertical datum used in Germany

    (short N. N. or NN) is an outdated official vertical datum used in Germany. Elevations using this reference system were to be marked Meter über Normal-Null

    Normalnull

    Normalnull

    Normalnull

  • Restrictions on geographic data in China
  • Restrictions on using GPS in China

    'Topographic map non-linear confidentiality algorithm') is a geodetic datum used by the Chinese State Bureau of Surveying and Mapping, and based on

    Restrictions on geographic data in China

    Restrictions_on_geographic_data_in_China

  • Glossary of firearms terms
  • part of the chamber that stops forward motion of the cartridge (the datum reference) to the face of the bolt. Used as a verb, headspace refers to the interference

    Glossary of firearms terms

    Glossary_of_firearms_terms

  • GPS signals
  • Signals broadcast by GPS satellites

    called chipping codes (in reference to CDMA/DSSS), pseudorandom noise (PRN) and pseudorandom binary sequences (in reference to the fact that the sequences

    GPS signals

    GPS signals

    GPS_signals

  • Irish grid reference system
  • System of geographic grid references used for mapping in Ireland

    example, 31590, 23467 is also a valid location. Spheroid: Airy modified, Datum: 1965, Map projection: Transverse Mercator Latitude of origin: 53°30'00

    Irish grid reference system

    Irish grid reference system

    Irish_grid_reference_system

  • Delta L problem
  • Problem in firearms manufacturing

    situations. The length specification "S" is a basic dimension (or a datum reference) for the computation of the dimensions of firearms cartridges and chambers

    Delta L problem

    Delta_L_problem

  • Global Positioning System
  • American satellite-based radio navigation service

    coordinate system, such as latitude and longitude using the WGS 84 geodetic datum or a country-specific system. The GPS equations can be solved by numerical

    Global Positioning System

    Global Positioning System

    Global_Positioning_System

  • KH-11 KENNEN
  • Type of American spy satellite

    Metric CRYSTAL System" (IMCS). Metric describes the capability to fix Datum references (markings) in an image relative to the World Geodetic System for mapping

    KH-11 KENNEN

    KH-11 KENNEN

    KH-11_KENNEN

  • Omne datum optimum
  • Bull issued by Pope Innocent II on 29 March 1139

    Omne datum optimum (Latin for "Every perfect gift", a quotation from the Epistle of James 1:17) was a papal bull issued by Pope Innocent II on 29 March

    Omne datum optimum

    Omne datum optimum

    Omne_datum_optimum

  • Knights Templar
  • Catholic military order, 1118 to 1312

    endorsed by the Catholic Church by such decrees as the papal bull Omne datum optimum of Innocent II, the Templars became a favoured charity throughout

    Knights Templar

    Knights Templar

    Knights_Templar

  • Areography
  • Delineation and characterization of Martian regions

    an arbitrary zero-elevation level or "vertical datum" for mapping the surface, called areoid. The datum for Mars was defined initially in terms of a constant

    Areography

    Areography

    Areography

  • Optical landing system
  • Visual landing system used on US Navy aircraft carriers

    regardless of the actual technology: Datum lights – a horizontal row of green lamps used to give the pilot a reference against which he may judge his position

    Optical landing system

    Optical landing system

    Optical_landing_system

  • International Terrestrial Reference System and Frame
  • World spatial reference system co-rotating with the Earth in its diurnal motion in space

    orientation parameters Geodetic datum International Celestial Reference System and its realizations Terrestrial reference frame World Geodetic System Clynch

    International Terrestrial Reference System and Frame

    International Terrestrial Reference System and Frame

    International_Terrestrial_Reference_System_and_Frame

  • Mediated reference theory
  • maintains that when one is acquainted with something, say, a present sense datum or oneself, one can refer to it without the mediation of anything like a

    Mediated reference theory

    Mediated_reference_theory

  • Synthetic data
  • Algorithmically generated data that have a similar distribution as sampled data

    (e.g., digital twins), where innovative approaches have already been referenced. Synthetic data is increasingly being used for machine learning applications:

    Synthetic data

    Synthetic_data

  • Angle of attack
  • Angle between the chord of a wing and the undisturbed airflow

    incidence meaning the angle between the chord of an airfoil and some fixed datum in the airplane. The lift coefficient of a fixed-wing aircraft varies with

    Angle of attack

    Angle_of_attack

  • Geodesics on an ellipsoid
  • Shortest paths on a bounded deformed sphere-like quadric surface

    of triangulation networks entailed reducing all the measurements to a reference ellipsoid and solving the resulting two-dimensional problem as an exercise

    Geodesics on an ellipsoid

    Geodesics on an ellipsoid

    Geodesics_on_an_ellipsoid

  • Direct reference theory
  • Theory in philosophy of language

    maintains that when one is acquainted with something, say, a present sense datum or oneself, one can refer to it without the mediation of anything like a

    Direct reference theory

    Direct_reference_theory

  • Modified transverse Mercator
  • coordinates depend meaningfully on the horizontal datum being used, so it is necessary to clarify whether the datum is NAD 27 (now rare), NAD 83, or NAD 83 (CSRS)

    Modified transverse Mercator

    Modified transverse Mercator

    Modified_transverse_Mercator

  • Eurovision Song Contest 2026
  • International song competition

    Retrieved 15 May 2026. Horne, Amanda (11 March 2026). "Eurovision 2026 i Wien – datum, länder och artister" [Eurovision 2026 in Vienna – dates, countries and

    Eurovision Song Contest 2026

    Eurovision Song Contest 2026

    Eurovision_Song_Contest_2026

  • Cephalometric analysis
  • Clinical application of cephalometry (measurement of parts of the head)

    important cephalometric landmarks, which are points of reference serving as datum references in measurement and analysis. (Sources: Proffit; others.)

    Cephalometric analysis

    Cephalometric_analysis

  • Lex Aquilia
  • Ancient Roman law

    the 3rd century BC. It was concerned with damage done from damnum iniuria datum, "damage unlawfully inflicted", a kind of a delict (or tort), albeit with

    Lex Aquilia

    Lex_Aquilia

  • History of geodesy
  • 1:210. This approximation to the true shape of the Earth became the new reference ellipsoid. In 1787 the first precise trigonometric survey to be undertaken

    History of geodesy

    History of geodesy

    History_of_geodesy

  • Roundness
  • Measure of how closely the shape of an object approaches that of a circle

    contact is taken as the datum point. Again a dial gauge is placed over the round object and the object is rotated keeping the datum at constant position

    Roundness

    Roundness

  • First appearance datum
  • Term to designate the first appearance of a species in the geologic record

    First appearance datum (FAD) is a term used by geologists and paleontologists to designate the first appearance of a species in the geologic record. FADs

    First appearance datum

    First_appearance_datum

  • Reference water levels
  • River navigation parameters

    nominal fairway depth (ideal minimum channel depth, TuGlW). Chart datum Vertical datum Muilerman et al. 2018, p. 63. Wang, Lu; Xie, Ping; Xu, Chong-Yu;

    Reference water levels

    Reference_water_levels

  • Discrete global grid
  • Partition of Earth's surface into subdivided cells

    in geodesy a so-called "grid reference system" is a grid that divides space with precise positions relative to a datum, that is an approximated "standard

    Discrete global grid

    Discrete global grid

    Discrete_global_grid

  • Hydraulic head
  • Specific measurement of liquid pressure above a vertical datum

    (normalized by specific weight) and the liquid elevation above a vertical datum. It is usually measured as an equivalent liquid surface elevation, expressed

    Hydraulic head

    Hydraulic head

    Hydraulic_head

  • Global Area Reference System
  • Standardized geospatial reference system

    WGS 1984 Datum and is based on lines of longitude (LONG) and latitude (LAT). It is intended to provide an integrated common frame of reference for joint

    Global Area Reference System

    Global Area Reference System

    Global_Area_Reference_System

  • List of geodesists
  • geodesy. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z See also References Pythagoras, 580–490 BC (ancient Greece) Eratosthenes, 276–194 BC (ancient

    List of geodesists

    List of geodesists

    List_of_geodesists

  • Altimeter setting
  • Setting for pressure altimeters

    an altimeter to read zero when at the reference datum of a particular airfield (in practice, the reference datum is either an airfield center or a runway

    Altimeter setting

    Altimeter_setting

  • Data (word)
  • English word

    now-rarely-used datum. In one sense, data is the plural form of datum. Datum actually can also be a count noun with the plural datums (see usage in datum article)

    Data (word)

    Data_(word)

AI & ChatGPT searchs for online references containing DATUM REFERENCE

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DATUM REFERENCE

  • Hunger
  • Surname or Lastname

    German and Dutch

    Hunger

    German and Dutch : from a Germanic personal name, Hun(e)ger, composed of the elements hūn ‘bear cub’ + gēr, gār ‘spear’.German : ethnic name from Ungar, Unger ‘Hungarian’.German : from Middle High German hunger ‘hunger’; a nickname for a thin or undernourished person, or sometimes a topographic name from a piece of land named with this word with reference to the infertility of the soil.English : probably from an Old English personal name, Hungār.

    Hunger

  • Manton
  • Surname or Lastname

    English

    Manton

    English : habitational name from any of the various places so called, for example in Leicestershire, Lincolnshire, Nottinghamshire, and Wiltshire. For the most part the first element is either Old English (ge)mǣne ‘common’, ‘shared’ (see Manley, Manship), or the Old English byname Mann(a) (see Mann). However, in the case of Manton in Lincolnshire the early forms show clearly that it was Old English m(e)alm ‘sand’, ‘chalk’, with reference to the poor soil of the region. The second element is in each case Old English tūn ‘enclosure’, ‘settlement’.Irish (Cork) : Anglicized form of Gaelic Ó Manntáin ‘descendant of Manntán’, a personal name derived from a diminutive of manntach ‘toothless’.

    Manton

  • MI-ATUM-U
  • Male

    Egyptian

    MI-ATUM-U

    , a son of Rameses II.

    MI-ATUM-U

  • HTUABI
  • Male

    Egyptian

    HTUABI

    , a title of the deity Tum or Atum.

    HTUABI

  • TATUM
  • Female

    English

    TATUM

    English surname transferred to forename use, TATUM means "Tate's homestead."

    TATUM

  • ATUM
  • Male

    Egyptian

    ATUM

    , the deity of the setting sun.

    ATUM

  • AHU
  • Male

    Egyptian

    AHU

    , Atum or Tum, the setting sun.

    AHU

  • Ur Atum
  • Boy/Male

    Egyptian

    Ur Atum

    Great.

    Ur Atum

  • Kinn
  • Surname or Lastname

    English

    Kinn

    English : from a Middle English personal name, which originated as a short form of any of various Old English personal names beginning with Cyne- ‘royal’.German : nickname for someone with a prominent chin, from Middle High German kinne ‘chin’, or from an Old High German personal name formed with the element kuoni ‘bold’ or chunni ‘race’, ‘people’. Compare Konrad.Norwegian : habitational name from any of several farmsteads named Kinn, from Old Norse kinn ‘chin’ with reference to the land formation.

    Kinn

  • Atum
  • Boy/Male

    Egyptian

    Atum

    Whole.

    Atum

  • Entoria
  • Girl/Female

    Latin

    Entoria

    Lover of Satum.

    Entoria

  • Tatum
  • Girl/Female

    American, Australian, British, Chinese, Christian, English, Netherlands

    Tatum

    Light Hearted; Bringer of Joy; Cheerful; Tate's Homestead

    Tatum

  • Marksbury
  • Surname or Lastname

    English

    Marksbury

    English : habitational name from Marksbury in Somerset (now Avon), which was named in Old English either as ‘Mǣrec’s or Mearc’s stronghold’ (from an Old English male personal name + burh ‘stronghold’, ‘fortified place’, dative byrig), or as ‘stronghold on a boundary’ (from mearc ‘boundary’, possibly a reference to the Wansdyke, + burh, byrig).

    Marksbury

  • Horsley
  • Surname or Lastname

    English

    Horsley

    English : habitational name from any of various places, for example in Derbyshire, Gloucestershire, Northumberland, Staffordshire, and Surrey, so named from Old English hors ‘horse’ + lēah ‘wood’, ‘clearing’. The reference is probably to a place where horses were put out to pasture. The surname is widespread in north-central England.

    Horsley

  • Tatum
  • Boy/Male

    British, English

    Tatum

    Cheerful

    Tatum

  • Tatum
  • Girl/Female

    English American

    Tatum

    Brings joy.

    Tatum

  • Tatum
  • Girl/Female

    Christian & English(British/American/Australian)

    Tatum

    Spirited

    Tatum

  • Lavender
  • Surname or Lastname

    English and Dutch

    Lavender

    English and Dutch : occupational name for a washerman or launderer, Old French, Middle Dutch lavendier (Late Latin lavandarius, an agent derivative of lavanda ‘washing’, ‘things to be washed’). The term was applied especially to a worker in the wool industry who washed the raw wool or rinsed the cloth after fulling. There is no evidence for any direct connection with the word for the plant (Middle English, Old French lavendre). However, the etymology of the plant name is obscure; it may have been named in ancient times with reference to the use of lavender oil for cleaning or of the dried heads of lavender in perfuming freshly washed clothes.

    Lavender

  • Satum
  • Boy/Male

    Latin

    Satum

    God of the harvest.

    Satum

  • Tatum
  • Surname or Lastname

    English (Essex)

    Tatum

    English (Essex) : variant of Tatham.

    Tatum

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Online names & meanings

  • Grist
  • Surname or Lastname

    English

    Grist

    English : of uncertain origin. It may be an occupational nickname for a miller, from the Middle English abstract noun grist ‘grinding’, Old English grist, a derivative of grindan (see Grinder). The word was not used in the concrete sense of grain to be ground until the 15th century.

  • Zemira
  • Biblical

    Zemira

    song; vine; palm

  • Cathy
  • Girl/Female

    Greek American French Latin Irish English

    Cathy

    Form of the Greek Catherine meaning 'pure'.

  • Taha | தஹா
  • Boy/Male

    Tamil

    Taha | தஹா

    Pure

  • Padraig Padraic
  • Boy/Male

    Irish

    Padraig Padraic

    From the Latin patricius “”nobly born.”” The patron saint of Ireland, it is hard to differentiate between fact and myth. What is probably true is that he was born in Britain around 373 AD and was brought to Ireland as a slave at the age of seven, possibly by Niall of the Nine Hostages (read the legend). Forced to guard sheep on the Slemish Mountains in Country Antrim for six years he had a vision urging him to convert his captors. He escaped to France where he trained as a priest before returning to Ireland where he banished the snakes (i.e. paganism) and converted the population to Christianity. Both Patrick and Padraig are very popular names in Ireland.

  • Pooshan
  • Boy/Male

    Indian

    Pooshan

    Nutrition

  • Veer
  • Boy/Male

    Gujarati, Hindu, Indian, Jain, Kannada, Kashmiri, Malayalam, Marathi, Parsi, Punjabi, Sikh, Traditional

    Veer

    Brave; A Brave Person

  • Braxton
  • Boy/Male

    American, Anglo, Australian, British, Chinese, English, Jamaican

    Braxton

    Brock's Town; Bracc's Settlement

  • Truan
  • Surname or Lastname

    Spanish (Truán)

    Truan

    Spanish (Truán) : nickname from truhán ‘knave’, ‘joker’.English (Cornwall) : unexplained; possibly a variant spelling of Trewin.

  • Sangjaap
  • Boy/Male

    Sikh

    Sangjaap

    Musical, Music

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Other words and meanings similar to

DATUM REFERENCE

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DATUM REFERENCE

  • Unity
  • n.

    In dramatic composition, one of the principles by which a uniform tenor of story and propriety of representation are preserved; conformity in a composition to these; in oratory, discourse, etc., the due subordination and reference of every part to the development of the leading idea or the eastablishment of the main proposition.

  • Transpadane
  • a.

    Lying or being on the further side of the river Po with reference to Rome, that is, on the north side; -- opposed to cispadane.

  • Twinning
  • n.

    The assemblage of two or more crystals, or parts of crystals, in reversed position with reference to each other in accordance with some definite law; also, rarely, in artificial twinning (accomplished for example by pressure), the process by which this reversal is brought about.

  • Stack
  • a.

    A section of memory in a computer used for temporary storage of data, in which the last datum stored is the first retrieved.

  • Datum
  • n.

    The quantities or relations which are assumed to be given in any problem.

  • Deliverance
  • n.

    Any fact or truth which is decisively attested or intuitively known as a psychological or philosophical datum; as, the deliverance of consciousness.

  • Ground
  • n.

    The basis on which anything rests; foundation. Hence: The foundation of knowledge, belief, or conviction; a premise, reason, or datum; ultimate or first principle; cause of existence or occurrence; originating force or agency; as, the ground of my hope.

  • Science
  • n.

    Accumulated and established knowledge, which has been systematized and formulated with reference to the discovery of general truths or the operation of general laws; knowledge classified and made available in work, life, or the search for truth; comprehensive, profound, or philosophical knowledge.

  • Data
  • pl.

    of Datum

  • Utricular
  • a.

    Resembling a utricle or bag, whether large or minute; -- said especially with reference to the condition of certain substances, as sulphur, selenium, etc., when condensed from the vaporous state and deposited upon cold bodies, in which case they assume the form of small globules filled with liquid.

  • Tweedle
  • v. t.

    To handle lightly; -- said with reference to awkward fiddling; hence, to influence as if by fiddling; to coax; to allure.

  • Reference
  • n.

    That which refers to something; a specific direction of the attention; as, a reference in a text-book.

  • Uzema
  • n.

    A Burman measure of twelve miles. V () V, the twenty-second letter of the English alphabet, is a vocal consonant. V and U are only varieties of the same character, U being the cursive form, while V is better adapted for engraving, as in stone. The two letters were formerly used indiscriminately, and till a comparatively recent date words containing them were often classed together in dictionaries and other books of reference (see U). The letter V is from the Latin alphabet, where it was used both as a consonant (about like English w) and as a vowel. The Latin derives it from it from a form (V) of the Greek vowel / (see Y), this Greek letter being either from the same Semitic letter as the digamma F (see F), or else added by the Greeks to the alphabet which they took from the Semitic. Etymologically v is most nearly related to u, w, f, b, p; as in vine, wine; avoirdupois, habit, have; safe, save; trover, troubadour, trope. See U, F, etc.

  • Dataria
  • n.

    Formerly, a part of the Roman chancery; now, a separate office from which are sent graces or favors, cognizable in foro externo, such as appointments to benefices. The name is derived from the word datum, given or dated (with the indications of the time and place of granting the gift or favor).

  • Reference
  • n.

    The act of referring, or the state of being referred; as, reference to a chart for guidance.

  • Datum
  • n.

    Something given or admitted; a fact or principle granted; that upon which an inference or an argument is based; -- used chiefly in the plural.

  • Ultramontanism
  • n.

    The principles of those within the Roman Catholic Church who maintain extreme views favoring the pope's supremacy; -- so used by those living north of the Alps in reference to the Italians; -- rarely used in an opposite sense, as referring to the views of those living north of the Alps and opposed to the papal claims. Cf. Gallicanism.

  • Twin
  • n.

    A compound crystal composed of two or more crystals, or parts of crystals, in reversed position with reference to each other.

  • Data
  • n. pl.

    See Datum.