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X Axis In Nature

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Consider as an example superimposing 3D Cartesian coordinates over all points on the Earth (i. e. geospatial 3D). What units make sense? Kilometers are ... Read more a good choice, since the original definition of the kilometer was geospatial. . . 10,000 km equalling the surface distance from the Equator to the North Pole. Where to place the origin? Based on symmetry, the gravitational center of the Earth suggests a natural landmark (which can be sensed via satellite orbits). Finally, how to orient X, Y and Z axis directions? The axis of Earth's spin provides a natural direction strongly associated with "up vs. down", so positive Z can adopt the direction from geocenter to North Pole. A location on the Equator is needed to define the X-axis, and the Prime Meridian stands out as a reference direction, so the X-axis takes the direction from geocenter out to [ 0 degrees longitude, 0 degrees latitude ]. Note that with 3 dimensions, and two perpendicular axes directions pinned down for X and Z, the Y-axis is determined by the first two choices. In order to obey the right hand rule, the Y-axis must point out from the geocenter to [ 90 degrees longitude, 0 degrees latitude ]. So what are the geocentric coordinates of the Empire State Building in New York City? Using [ longitude = −73. 985656, latitude = 40. 748433 ], Earth radius = 40,000/2π, and transforming from spherical --> Cartesian coordinates, you can estimate the geocentric coordinates of the Empire State Building, [ x, y, z ] = [ 1330. 53 km, –4635. 75 km, 4155. 46 km ]. GPS navigation relies on such geocentric coordinates.

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of distance on each x axis  X Axis In Nature

of distance on each x axis

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being the axis or balance  X Axis In Nature

being the axis or balance

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types  x axis  estimated  X Axis In Nature

types x axis estimated

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 horizontal  axis line is  X Axis In Nature

horizontal axis line is

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across temporal  x-axis   X Axis In Nature

across temporal x-axis

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X axis in nature a x axis  X Axis In Nature

X axis in nature a x axis

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Shiny Happy Playground  X Axis In Nature

Shiny Happy Playground

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time x axis int   X Axis In Nature

time x axis int

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X axis in untreated  X Axis In Nature

X axis in untreated

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Plotted along the x axis  X Axis In Nature

Plotted along the x axis

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photographs  x-axis  vs   X Axis In Nature

photographs x-axis vs

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The dependence of critical  X Axis In Nature

The dependence of critical

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the CK-p25 model  x axis    X Axis In Nature

the CK-p25 model x axis

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