Template talk:Oscoor

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1 Irish Grid Reference
2 Which alternative?
3 Use from external website
4 Link to geograph
5 datum
6 Interwiki
7 Category

[edit] Irish Grid Reference

Get-a-map for Irish grid refrences exists see clifden it uses the A to Y notation followed Km North and East.

but is not yet supported by template:oscoor for example, see Giant's Causeway --Red King 17:12, 12 May 2005 (UTC)

[edit] Which alternative?

The instructions above say use one of the templates which use this one, but cites no examples. Andy Mabbett 13:24, 6 September 2005 (UTC)

There is good list of them at template talk:gbmapping but for the definitive list use Whatlinkshere and then your browser's search facility to find "late:". -- RHaworth 16:35:31, 2005-09-06 (UTC)

[edit] Use from external website

It would be wonderful to be able to use this (or something like it) from an external website, so that the link would be to, say

http://en.wikipedia.org/Oscoor?SK123456

which would return the Wikipedia page with links to the various mapping services (and thereby promote Wikipedia!). Andy Mabbett 13:27, 6 September 2005 (UTC)

The present external destination is liable to change without notice. But I intend to keep

http://www.rhaworth.myby.co.uk/oscoor_a.htm?SK176462_region:GB (more interesting than SK123456 - [1])

available indefinitely and compatible with the present parameters. To underscore this, I have just changed Elmbridge to use it. Feel free to use - it helps my Google rating! -- RHaworth 16:25:28, 2005-09-06 (UTC)

If you want to feel a little more independant of my site, and especially if you are creating lots of links:

copy http://www.rhaworth.myby.co.uk/rwh/go_egil.htm from my site and put it on your site
you can then create much simpler map links in the form <A href="go_egil.htm?TL256338"> for example
Gosh. A place that admits that clots live there.

That way, if anything happens and oscoor_a.htm moves for some reason, you will only have one file that needs changing. On the minus side, this means that you will have not one but two layers of back button breaking improper redirects. (Sorry I aint got into any other sort of scripts yet.) -- RHaworth 23:07:26, 2005-09-06 (UTC)

[edit] Link to geograph

Can you add in link to Geograph (UK photographs of every 1km grid square) Using their browse.php seems to take an OS Grid ref

eg. http://www.geograph.co.uk/browse.php?gridref=SK176462 to use the example above.

As the photos are under {{cc-by-sa-2.0}} they can be used in articles

-- Elwell 11:28, 26 September 2005 (UTC)

Now done - and it did not require an edit to a protected page. -- RHaworth 06:27, 16 January 2006 (UTC)

can link like http://www.geograph.co.uk/gridref/SK176462 if that helps

[edit] datum

For those interested in fine detail, be aware that the lat/long calculated by this resource are for the OSGB 36 datum. This will give slight errors if they are used in resources that expect WGS 84. For example if we ask multimap to show us Mavis Enderby using her grid reference directly we get this. But if we do it via oscoor (select the "Multimap - with circle (using lat/long)" option) the circle falls about 100 metres away.

Fortunately Template:coor assumes that lat/long are in OSGB 36 when it converts them back to a Grid Ref, so we do not get any "drift". -- RHaworth 06:27, 16 January 2006 (UTC)

This means that Template:Oscoor, and all the templates that use it, e.g. Template:gbmapping, are of little use if you want to pinpoint the exact location of a building or street. And it means that the grid references generated via Template:coor are also inaccurate by 100m or so. However, User:The Anomebot2 (a bot) is correctly converting grid references found within articles into WGS-84 latitude/longitude in Template:coor title d. Such articles then contain two geo refs which are displayed as about 100 metres apart.

What are needed are routines to convert OSGB36 lat/longs to and from WGS-84 lat/longs.--Dr Greg 18:23, 15 March 2007 (UTC)

This conversion uses a Helmert Transform. See http://www.movable-type.co.uk/scripts/LatLongConvertCoords.html, or http://www.ordnancesurvey.co.uk/oswebsite/gps/information/coordinatesystemsinfo/guidecontents/, for example. --Dr Greg 12:47, 16 March 2007 (UTC)