Arliss Whiteside 2010-03-23 2010-03-23 2012-02-14 grid spacing Spacing between adjacent grid lines, or between centers of adjacent pixels grid spacing Arliss Whiteside 2010-03-23 OGC 07-092r3 Table 9 2010-03-23 2012-02-14 meter metre The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second. meter metre 2012-02-14 OGC Units of Measure 1.0 OGC Units of Measure 1.0 EPSG units of measure EPSG units of measure 1. The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12. 2. When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles, or specified groups of such particles. mol The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second. m ISO 10000 2012-02-14 units of measure units of measure Arliss Whiteside 2010-03-23 OGC 07-092r3 Table 9 2010-03-23 2012-02-14 unity unitless ratio of two quantities with the same units unity Arliss Whiteside 2010-03-23 OGC 07-092r3 Table 9 2010-03-23 2012-02-14 degree Angular degree degree SI units of measure SI units of measure Arliss Whiteside 2010-03-23 OGC 07-092r3 Table 9 2010-03-23 2012-02-14 radian Angular radian radian The kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. K The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram. kg The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom. s The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. cd 2012-02-14 UCUM Units of Measure 0 UCUM Units of Measure 0 2012-02-14 OGC Units of Measure OGC Units of Measure The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 m apart in vacuum, would produce between these conductors a force equal to 2 x 10–7 newton per metre of length. A 2012-02-14 UCUM Units of Measure UCUM Units of Measure units of measure definitions units of measure definitions units of measure definitions units of measure definitions