Re: UK grid location / GPS positioning

I have the Garmin Foretrex 201. I changed the settings and it now displays
as an UK grid reference but I have not found yet the settings for
true/magnetic North reference. Still looking.

"David Lee" <davidlee_malvern@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:o5OdnYATY_GOJ1_eRVny1g@xxxxxxxxxxxxxxxxx
> ah wrote ...
>> Please pardon my ignorance.
>>
>> How can I relate the indication found on UK OS maps with my positioning
>> on GPS.
>>
>> For example, on the map I read TQ 274 783 and on my GPS N51 29 365 W0 09
>> 968
>>
>> I think that I understand how both system work separately but I can not
>> relate them.
>
> You don't say which GPS receiver you have. However it will probably be
> able to display your position as an UK grid reference.
>
> For example in a Garmin etrex you would go to "Menu" ("Main Menu" in a
> Vista) - "Setup" - "Units" and then change "Position format" to "British
> Grid" (it will probably say something like "hddd*mm*ss.s" at the moment).
> It's vital that you also select the correct "Map Datum". In some
> receivers (like the Vista) this will be done for you when you select
> "British Grid" but in others (eg yellow etrex) you have to do it
> manually - either way, make sure that it's set to "Ord Srvy GB" (I suspect
> it will be set to "WGS84" at present). Other makes and models may differ
> a bit but it should be obvious what you need to set.
>
> Whilst you are at it you should select the correct "North Ref". It will
> probably be set to "True" by default but if you are going to be using a
> magnetic compass then you should normally select "Magnetic", so that North
> on the GPS will correspond the the direction of your compass needle.
> However if you have a fancy compass that has an adjustable deviation
> setting you should choose "Grid", when North on the GPS would correspond
> to North straight up the gridlines of your OS map.
>
> HTH
>
> David
>


.

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