kriging definition which equation is the variance of the error in kriging? why is variance an expression in kriging why is variance an expression how come variance of the error becomes an expression like that what is the variance of the error of simple kriging? why variance of error is an expression kriging example why is variance of the error in kriging such an expression which equation is used to deduce kriging why is variance of the error the same as the variance of the error in simple kriging? kriging definition how come the variance of the error became expression like that how do you explain kriging how come the variance of the error is expressed how do i understand kriging how kriging works explain the derivation of kriging how do you derivate the variance of an expression from the kriging? how to figure out the variance of an expression in kriging