I just want to share some concerns with you, about practices on the field.
In the site where I am currently working the Ground Control points were "ADJUSTED" (MOVED is the right word), according with the explanation of the person in charge of the surveying crew. In my opinion and based in my experience, this is not a good practice, instead of, PLACING NEW ONES close to the points that you find are moved can be a better alternative.
Another possible question is: Why do you adjust a Ground Control Point?. Because it is off 5mm.. or 8mm....or more than 15mm...
I do my work using a Sokkia Robotic. The bigger distance is not more than 120 mts.
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