define: datum
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datum datum ‎(plural data or datums) ( 1 plural: data) A measurement of something on a scale understood by both the recorder (a person or device) and the reader (another person or device). ( 2 plural: data) (philosophy) A fact known from direct observation. ( plural: data) (philosophy) A premise from which conclusions are drawn.
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Datum (geodesy) Horizontal datums are used for describing a point on the earth 's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.orizontal datums are used for describing a point on the earth 's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.
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Chart datum Chart datum. A chart datum is the level of water that charted depths displayed on a nautical chart are measured from. A chart datum is generally a tidal datum; that is, a datum derived from some phase of the tide.[1] Common chart datums are lowest astronomical tide[1] and mean lower low water.
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Checksum A checksum is a small-sized datum derived from a block of digital data for the purpose of detecting errors which may have been introduced during its transmission or storage. It is usually applied to an installation file after it is received from the download server.
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Frequently Asked Questions The datum is defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment. A total of 106,724 kilometers of leveling was involved, constituting 246 closed circuits and 25 circuits at sea level.
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Vertical Datums More broadly, a vertical datum is the entire system of the zero elevation surface and methods of determining heights relative to that surface.Over the years, many different types of vertical datums have been used. The most predominant types today are tidal datums and geodetic datums. . Each of these datums has either a single datum origin point, otherwise known as a primary bench mark, or one such point per island in its coverage area. Every datum origin point in these five datums is at a tide gage.
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What Is a Datum Line? In general, a datum line is a tool used by engineers to ensure the accuracy of measurements. Engineers use the datum line as a horizontal base line to exactly measure various heights. Datum lines are valuable in the development of railway plans, as well as other complex engineering drawings.
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Datum (geodesy) Horizontal datums are used for describing a point on the earth 's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.
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Dr. Stephen M Gross Dr. Stephen M Gross, OD, is an Optometry specialist in Spanish Fort, Alabama. He attended and graduated from University Alabama Birmingham - School Of Optometry in 1981, having over 37 years of diverse experience, especially in Optometry. Dr. Stephen M Gross also cooperates with other doctors and physicians in medical groups including Coastal Eye Care Llc. Dr. Stephen M Gross accepts Medicare-approved amount as payment in full.
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nexus (ˈnɛksəs) n, pl nexus. 1. a means of connection between members of a group or things in a series; link; bond. 2. a connected group or series. [C17: from Latin: a binding together, from nectere to bind]
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What's the difference between a projection and a datum? Just a small comment on the first line Datums, i.e. Geographic coordinate systems. It sounds like a Datum is a geographic coordinate system. That's not the case. Datums are part of a simple ellipsoidal earth model. Geographic coordinate systems uses a datum as part of it's definition.
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Tertiary Student Concession : Auckland Transport New Zealand What you need to know : ** Your AT HOP card needs to be registered before a tertiary concession can be applied. ** You may only hold one AT HOP card with a tertiary concession on it. ** Your AT HOP tertiary concession will expire on the same date as your student ID or AT tertiary ID sticker, whichever is the earliest.ou have the option to register a card for yourself or for someone else if you want to manage the card on your account. Find out about managing cards for others. Step 3: Ensure you have proof of eligibility. Get an AT Tertiary ID sticker on your Tertiary Student ID card from your tertiary institute to prove eligibility.
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baseline baseline (plural baselines) 1  A line that is a base for measurement or for construction. 2  A datum used as the basis for calculation or for comparison. ( 3 typography) A line used as the basis for the alignment of glyphs. ( tennis) The line at the farthest ends of the court indicating the boundary of the area of play.
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- septum noun [C]. › a ​thin ​part ​dividing ​tissues or ​spaces in an ​organ such as the ​nose or ​heart: the ​nasal septum. (Definition of septum from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press). Browse. 1  septic.
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- Many careful writers insist that the words data and media are Latin plurals and must, therefore, be used as plural words. The singular Latin forms of these words, however, are seldom used: datum as a single bit of information or medium as a single means of communication.
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GD&T Glossary and Resource Symbols and Terms Datum Target GD&T Training Definition. Geometric Dimensioning & Tolerancing GD&T Training. GD&T Training Definitions. Datum Target - is a specified point, line, or area on a part that is used to establish the Datum Reference Plane for manufacturing and inspection operations.
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GD&T â Datum â A Better Insight â ASME Y14.5 Datum Facts. Datums are theoretically perfect points, lines, and planes. Datums exist within a structure of three mutually perpendicular intersecting planes known as a datum reference frame. A part is oriented and immobilized relative to the three mutually perpendicular planes of the datum reference frame in a selected order of precedence.
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Geodetic datum Geodetic datum. A geodetic datum or geodetic system is a coordinate system, and a set of reference points, used to locate places on the Earth (or similar objects). An approximate definition of sea level is the datum WGS 84, an ellipsoid, whereas a more accurate definition is Earth Gravitational Model 2008 (EGM2008), using at least 2,159 spherical harmonics.
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Datum (geodesy) Horizontal datum. The horizontal datum is a series of data points on the surface of the earth. The horizontal datum is primarily used to measure the position of oneself on the Earth's surface (latitude and longitude). Various datums have been used in the past.
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datum meter reading, reading, indication - a datum about some physical state that is presented to a user by a meter or similar instrument; he could not believe the meter reading; the barometer gave clear indications of an approaching storm. statistic - a datum that can be represented numerically. Translations.
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- Learner's definition of NEXUS. [singular] formal. : a relationship or connection between people or things — often + between or of. the nexus between teachers and students. the nexus between drugs, guns, and crime. a nexus of money and politics.
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Plural Noun Forms Report Abuse. Many careful writers insist that the words data and media are Latin plurals and must, therefore, be used as plural words. The singular Latin forms of these words, however, are seldom used: datum as a single bit of information or medium as a single means of communication.
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Data 1640s, plural of datum, from Latin datum (thing) given, neuter past participle of dare to give (see date (n.1)). Meaning transmittable and storable computer information first recorded 1946. Data processing is from 1954.
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Vertical Datums More broadly, a vertical datum is the entire system of the zero elevation surface and methods of determining heights relative to that surface. Over the years, many different types of vertical datums have been used. The most predominant types today are tidal datums and geodetic datums.
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Geodetic Datums By Amanda Briney, Geography Intern. A geodetic datum is the tool used to define the shape and size of the earth, as well as the reference point for the various coordinate systems used in mapping the earth. Throughout time, hundreds of different datums have been used-each one changing with the earth views of the times.
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A tutorial on Datums The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch. MHW.