David, You might want to check the OS GPS at - http://www.gps.gov.uk/
Greg > -----Original Message----- > From: Eagle, David A [SMTP:[EMAIL PROTECTED] > Sent: Tuesday, October 28, 2003 10:29 > To: [EMAIL PROTECTED] > Subject: MI-L Off topic GPS Question - Scotland > > This is a vague question because I have very vague information at the > moment > and its posed at those of you who deal with GPS surveying...The surveys I > am > questioning are in Scotland, Uk. > > Situation: A vehicle survey with GPS tracking its position has been done > in > the Central Belt of Scotland (Glasgow, Edinburgh region) and the returned > results when converted from Lat/Long to BNG were spot on. A similar survey > further north near Dundee produced converted BNG coords with a southerly > 10-15m error. Then moving further north still to a point near Aberdeen the > coords are out to the south by 15-20m. > > The errors are consistent and seem progressive as you move north. > > My question to the masses is, how would you explain this and what would > you > do about it? I don't expect miracles as I haven't provided much technical > detail... > > I am inclined to believe some sort of calibration may have been done in > the > south and not altered for the two northerly surveys...is there any way of > checking in the NMEA message string whether the data is being corrected > differentially? > > Any thoughts greatly appreciated...sorry about the sketchy info, its being > fed to me slowly. > > Best Regards, David > > > > This email and any attached files are confidential and copyright > protected. > If you are not the addressee, any dissemination of this communication is > strictly prohibited. Unless otherwise expressly agreed in writing, nothing > stated in this communication shall be legally binding. > > > > --------------------------------------------------------------------- > List hosting provided by Directions Magazine | www.directionsmag.com | > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > Message number: 8902 > > Internet communications are not secure and therefore Surrey Police does not accept legal responsibility for the contents of this message. This email and any attachments may be confidential. They may contain privileged information and are intended for the named addressee (s) only. They must not be distributed without our consent. If you are not the intended recipient, please notify us immediately and delete the message and any attachments from your computer, do not disclose, distribute, or retain this email or any part of it. Unless expressly stated, opinions in this email are those of the individual sender, and not of Surrey Police. We believe but do not warrant that this e-mail and any attachments are virus free. You must therefore take full responsibility for virus checking. Surrey Police reserves the right to monitor all email communications through their networks.
