I've set up a page on my website which should enable you to find out
your height above sea-level as well as the sunrise/sunset time.

To find it, go to http://www.jstott.me.uk/gmapsgeotools/

All you do is to centre the map on where you are (or where you want to
find out about) and click either the "Get Height" or "Get
Sunrise/Sunset" buttons (after modifying the date/timezone/dst if you
want). Height data covers the whole of the maindland UK and islands up
to 60 degrees north, as well as some parts of Ireland, France, Belgium
and Holland.

If you're interested, the height data is derived from the Shuttle Radar
Topography Mission data which has data points every 3 arc seconds
between 56 degrees south and 60 degrees north. For the UK, 3 arcseconds
works out at aroundabout 90m. Vertical accuracy is reported to be within
16m - the height for my location is given as 7m when I'd previously read
it off an OS map as being 8m.

It would be interesting to know about your views on user-friendliness,
other ideas for geographic tools like that (distance between two points?
areas?), apparent accuracy or just plain errors! I already have plans to
display the latitude/longitude at the centre of the map as well as the
OS grid reference.

--
Jonathan Stott
Canterbury Weather: http://www.canterburyweather.co.uk/
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