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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>In my opinion, it should be unnecessary to add the smaller area relations as subarea role members of the larger ones (as I see has recently been added to the boundary relation wiki page) – this is a geographic database and if correctly tagged then the admin_level and the physical location within an admin area the next class up should be sufficient. In the UK I think the subarea role has only been used on a few relations in the Kent area IIRC (I forget now, but when I was writing a boundary validation program I discovered that recursing relation members of relations needed to exclude the subarea role to identify which boundary actually had the issue).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you do decide to add electoral boundaries (there are currently relatively few entered in GB – ~88 in last night’s Geofabrik extract, 2 of which need fixing[1]), then after some discussion on IRC we came up with a political_division tag as mentioned on <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dpolitical">http://wiki.openstreetmap.org/wiki/Tag:boundary%3Dpolitical</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>and again, the location should mean subarea roles aren’t required.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Just my opinion though. Perhaps others can think of a reason subarea members might be useful?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ed<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>[1] <a href="http://www.loach.me.uk/osm/boundaries/political.aspx">http://www.loach.me.uk/osm/boundaries/political.aspx</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Bob Hawkins [mailto:bobhawkins@waitrose.com] <br><b>Sent:</b> 14 November 2011 16:35<br><b>To:</b> talk-gb@openstreetmap.org<br><b>Subject:</b> [Talk-GB] Administrative boundaries and parent/child relations<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I am interested to learn other contributors' thoughts on the benefits, or otherwise, of adding child relations to parents for hierarchical United Kingdom administrative areas as in county/local authority district/civil parish or unitary authority/civil parish, for example. With the recent benefit of OS OpenData Boundary-Line, should it be widely practised? Is it worthwhile to add electoral boundaries and apply to them, also?<o:p></o:p></span></p></div></div></div></body></html>