On Tue, 2010-06-22 at 21:33 +0100, John Robert Peterson wrote: > So the question is -- where do we get the first points from? There is > one very old and well known building right in the middle of the area, > and there are a number of land marks around, these may be usable, but > how do I know their positions?
In my brief foray into surveying, we gained the starting point using differential GPS. I can't remember the details, but it used an expensive looking pair of Leica GPS units. If you can get access to something like that... ;) I second the trig points though if you can see some. Does your total station allow manual pointing? How about borrowing a theodolite for fixing your location? _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
