gmxUom units of measure dictionary compliant with SI definitions ISO/TC 211 GMX (and imported) namespace 0.0 2005-03-18 The metre is the length of the path travelled by ligth in vaccum during a time interval of 1/299 792 458 of a second metre length m Measure of angle equal to Pi/180 radians, widely used in geography degree angle 1.74532925199433E-02 Radian is an unit of angle measure. It is defined as the ratio of arc length to the radius of the circle. radian plane angle rad