what does datum point mean
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- In general, a datum is a base elevation used as a reference from which to reckon heights or depths. A tidal datum is a standard elevation defined by a certain phase of the tide.
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- If an individual data point can be considered anomalous with respect to the rest of the data, then the datum is termed as a point outlier. This is the simplest type of outlier and it is the focus of the majority of research on outlier detection.
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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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Definitions &Translations Wiktionary (0.00 / 0 votes) Rate this definition: datum (Noun) 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). The scale is arbitrarily defined, such as from 1 to 10 by ones, 1 to 100 by 0.1, or simply true or false, on or off, yes, no, or maybe, etc. datum (Noun) plural: data a fact known from direct observation
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Vertical Datums Vertical Datums. Vertical Datums. A vertical datum is a surface of zero elevation to which heights of various points are referred in order that those heights be in a consistent system. More broadly, a vertical datum is the entire system of the zero elevation surface and methods of determining heights relative to that surface.
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- Datum is, from its Latin origin, a singular form of data, and may refer to a single item of data. 1 Singular data point.
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dew point definition, dew point meaning | English dictionary focal point. n. 1. (General Physics) Also called: principal focus or focus the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection. 2. a central point of attention or interest.
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True Position The tolerance zone is equally disposed about the datum axis for concentricity. The Concentricity requires that the median points of the controlled feature, regardless of its size, to be within the tolerance zone. Runout tolerances can be state by two tolerance zone. These are circular or total runout.
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POINT OF REFERENCE Hyponyms (each of the following is a kind of point of reference): bench mark; benchmark (a surveyor's mark on a permanent object of predetermined position and elevation used as a reference point). landmark (a mark showing the boundary of a piece of land).
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What Is a Datum Line? Quick Answer. A datum line is a point of reference or standard for comparison. The term is primarily used in reference to surveying and engineering, where it is used in the measurement of depths and heights. Continue Reading.
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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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- Tidal Datums. In general, a datum is a base elevation used as a reference from which to reckon heights or depths. A tidal datum is a standard elevation defined by a certain phase of the tide.
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datum 1. pl. da·ta (-tə) A fact or proposition used to draw a conclusion or make a decision. See Usage Note at data. 2. pl. da·tums A point, line, or surface used as a reference, as in surveying, mapping, or geology.
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FAULT LINE (geology) line determined by the intersection of a geological fault and the earth's surface. Classified under: Nouns denoting spatial position. Hypernyms (fault line is a kind of...): line (a spatial location defined by a real or imaginary unidimensional extent).Domain category: FAULT LINE (noun). The noun FAULT LINE has 1 sense: 1. (geology) line determined by the intersection of a geological fault and the earth's surface. Familiarity information: FAULT LINE used as a noun is very rare.
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What is a Horizontal Datum Reference Frame? A horizontal (geometric) datum (or reference frame) forms a basis for computations of horizontal positions on the Earth. It is a collection of specific points on the Earth’s surface that have been accurately identified according to their precise northerly or southerly location (latitude) and easterly or westerly location (longitude).
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"Geological Terms Beginning With ""D""" A reference location or elevation which is used as a starting point for subsequent measurements. Sea level is a datum for elevation measurements. Datums can also be arbitrary such as the starting point for stream stage measurements or based upon a physical feature such as the base of a rock unit.
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Definitions &Translations Point, Null A nodal point in electrical resonators; a point where in a system of waves or oscillations, there is rest, the zero of motion being the resultant of oppositely directed and equal forces. In electrical resonators it is to be sought for in a point symmetrically situated, with reference to the spark gap, or in a pair of points, which pair is symmetrically placed.
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datum datum (Noun). 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). The scale is arbitrarily defined, such as from 1 to 10 by ones, 1 to 100 by 0.1, or simply true or false, on or off, yes, no, or maybe, etc.
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- Their purpose is to show the position of improvements in relation to other site features, neighbouring features, site boundaries, easements and the like. Levels may be related to a local or assumed site datum, or as is becoming far more prevalent Australian Height Datum (AHD).
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What are 'Basis Point (BPS)' A basis point is a unit of measure used in finance to describe the percentage change in the value or rate of a financial instrument. One basis point is equivalent to 0.01% (1/100th of a percent) or 0.0001 in decimal form. In most cases, it refers to changes in interest rates and bond yields. For example, if the Federal Reserve Board raises interest rates by 25 basis points, it means that rates have risen by 0.25% percentage points.
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- Latitude lines are a numerical way to measure how far north or south of the equator a place is located. The equator is the starting point for measuring latitude--that's why it's marked as 0 degrees latitude.
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- or centerplane is exactly 90 degrees to a datum. Perpendicularity Control A geometric tolerance that limits the amount a surface, axis or centerplane is permitted to vary from being perpendicular to the datum. Perpendicularity 6
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Dimensional Engineering - Datums are Important The definition of a Datum from the Dimensioning and Tolerancing Standard ASME Y14.5-2009 is: A theoretically exact point, axis, line, plane, or combination thereof derived from the theoretical datum feature simulator. In other words, Datums have the following characteristics. (1) Datums are the origins from which the GD&T and Measurements are established.
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- How long can heart palpatations last after prednisone? Last dose yesterday, can't sleep due to tremor/palps. Been having a feeling that my heart isn’t beating which lasts 30 minutes or so. Have palpitations and everyone is telling me it’s anxiety? How much time do heart palpitations last? Would it be unusual or concerning for heart palpitations to last? A week ago I started having heart palpitations once and then last three days I've had them 2 times a day???
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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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Geodetic datum In surveying and geodesy, a datum is a reference system or an approximation of the Earth's surface against which positional measurements are made for computing locations. Horizontal datums are used for describing a point on the Earth 's surface, in latitude and longitude or another coordinate system.n 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.