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Posted by Mike Coon on February 6, 2010, 6:18 am


Thibaud Taudin Chabot wrote:
> Any outdoor gps used for tracking etc. can handle the British
> ordinance survey grid coordinates.

And also the conversion between WGS84 and the datum used by Ordnance Survey.
(Not "Ordinance"; ordnance means gunnery which is why it was originally of
national importance. Ordinance pertains to that which has been ordained.)

To use a strictly road-based navigation device (I don't know the Nuvi 650)
you need to find the nearest road! This could be done via the web by using a
service that will accept OSGB grid references such as
http://www.streetmap.co.uk/

Mike.
--
If reply address is invalid, remove spurious "@" and substitute "plus"
where needed.



Posted by Mike Lane on February 6, 2010, 8:04 am


Thibaud Taudin Chabot wrote on Feb 6, 2010:

> HGS schreef:
>> Hi
>>
>> I have a nuvi 650. I am trying to find out how to plot a route to a remote
>> location that does not have a postal address, in fact it is the middle of
>> the countryside. I do have a British ordinance survey grid reference for my
>> location. Any ideas how best to tackle this kind of problem?
>>
>>
> British ordinance survey grid is normally not used for navigation but
> for positioning and locating an item (that is why the word <survey> is
> used in the name). It is very hard to use it for navigation unless your
> navigation program internally can transfer the coordinates to wgs84
> before doing the calculations.
> Any outdoor gps used for tracking etc. can handle the British ordinance
> survey grid coordinates.

By the way it is 'ordnance survey' (not 'ordinance' - presumably because it
was originally done for military purposes.

--
Mike Lane
UK North Yorkshire
email: mike_lane at mac dot com


Posted by maceda on February 7, 2010, 4:11 am


If you know the positions in advance of your trip, you could enter OS
refs direct into Mapsource, and then transfer them to your 650


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