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z-Axis - definition(s)

z-axis - [coordinate systems] In a spherical coordinate system, the vertical line that runs parallel to the earth's rotation, passing through 90 degrees north latitude, and perpendicular to the equatorial plane, where it crosses the x- and y-axes at the origin (0,0,0).

[Category=Geospatial ]

Source: esri, 16 October 2012 09:20:04, External 

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