Using Control Points in a Data Set?

The distinction that needs to be made is that control points are points that you use to reference, to tie down your data set. Soi just want to make sure that i've understood there. We we break it down into absolute accuracy, relative accuracy and then density. Thoese re cont of the three man things looking at when we're checking point clouds. And i can'd have covered the absolute already, that's the control points. But it can be a problem the relative, especially for some systems,. with kind of lower grade i mus it can be really difficult to tie the data together if it's not calebrated properly.