hello.

in the uk, what setting in feet about sea-level should i set my digi
barometer?

i live in northampton uk

If I am not mistaken, Ordnance Survey maps show elevations. Check before
you buy, of course. There are probably several different types of
maps available. Also, the nearest airport or weather bureau should
give you the data you need to set your barometer. Assuming that the
barometer reading published by your nearest airport or similar source is
standardized for altitude (most of the time it is), then all you do is
adjust your barometer to the exact same reading published by the airport,
etc. Note: if you are at a significantly different altitude from the site
you using as a reference, then you must do a further adjustment to
compensate for that change in altitude. This is even if you took your
barometer right to the airport and set it as mentioned above. Also, you
want to be no more than sixty miles from your "benchmark" barometer--preferably
much closer. Another possible benchmark or source is a local weather
channel on TV (if applicable in your area) and weather-related web sites
maintained by government or private individuals. Do a google search for
such web sites (in the latter case). Phone HM Government and ask them
where your nearest government weather bureau is and how to contact them.
There is lots of information on the internet if you do a goodle search on
"aneroid barometer adjustment" or similar search strings. This
information will acquaint you with important basic issues surrounding
barometers of all and several types. Regards, Ian D.

On 9 Feb 2005 wrote:

hello.

in the uk, what setting in feet about sea-level should i set my digi
barometer?

i live in northampton uk

"Ian W. Douglas" wrote in message
...

If I am not mistaken, Ordnance Survey maps show elevations. Check
before
you buy, of course.

They do indeed ... and now you don't even need to buy the chart to do
this task: here is the new entry which I am working up for the
uk.sci.weather FAQ which deals with this.

The best way to determine your *altitude* above mean sea level (again UK
only), is to use an Ordnance Survey map with contours marked at 5m
intervals. Use this link:-

http://www.ordnancesurvey.co.uk/oswebsite/getamap/

accept the terms/conditions, then use the search facility to find your
location and zoom in to the maximum extent. It should be possible to
determine with acceptable accuracy the height using the contours and
spot heights given.



Martin.


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