The actual orthometric height
difference [DELTA]H of point B is the length of the plumb line (passing through the point B) in between the reference surface [W.
In many positioning, mapping, and exploration applications, conventional spirit levelling is being replaced by orthometric height
determination using GPS and the geoid.
where point position is represented by geographical latitude and longitude (B , L), h is ellipsoidal height, H is orthometric height
A yet further opportunity for injecting error into the whole process can arise from the perceived need to operate in orthometric height
The differences between normal, normal-orthometric and orthometric heights
were not taken into consideration.
In Slovenia, heights are determined in the height system of spheroidal (normal) orthometric heights