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Grid Ref to map sources redirector

GB Grid Reference to Lat/Long converter

Error: If alpha used, there must be an even number of digits
Search argument is: ?pagename=List_of_stone_circles&params=NR892834643_region%3AGB_scale%3A25000
How to use this resource | Usage log |
What is a grid reference anyway?
Code derived from convert.c found among Tony Fisher's files.
See also this interactive guide to the National Grid.
  Copyright © 2005 - 2011 Roger W Haworth and several others
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public Licence as published by the Free Software Foundation; either version 2 of the License, or any later version.
This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public Licence for more details.

Source code

compared with geohack.php and includes as at 2011 Feb 23 cooerr.php this file, included by coor_g.php on errors new coor_g.php OSGB36 → WGS84 converter
Roger Haworth's own work. All the following are by others new geohack.php map sources display can use geotemplate.txt for testing geo_param.php included by geohack.php same helm_gb.php required by transversemercator.php new llfuncsm.php required by coor_g.php new mapsources.php included by geohack.php uses WGS2OSGB() and generates $osgb36_6fig transversemercator.php required by mapsources.php added WGS2OSGB