Quote:
Originally Posted by Karlsson
This is correct provided both sets of coordinates refer to the same map datum (reference grid, not unlike J2000 and B1950 for RA/Dec) - do not take that for granted though...
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You are most certainly spot-on there brother: working off raw data, your comments are even more pertinent: I guess (?!?) my response, especially factors re mount inaccuracies that rarely get canvassed, make some of the musings rather less relevant than some make issue of.
I note that you're an engineer Karlsson - though I don't know of what persuasion: consulting on my own projects with your profession has led me to understand that factors such as soil movement and structural expansion/contraction can have significant effects; for IIS purposes re the stability of any optical alignments, particularly when many consider that piers etc are "set-and-forget" procedures.
I'd be interested to hear your own views on these matters.....
Regards, Darryl.