[OSM-talk] Administrative boundaries (UK)

[Andy Robinson (blackadder-lists)]

Peter Miller wrote:
>Sent: 25 August 2008 7:26 PM
>To: talk at openstreetmap.org
>Subject: Re: [OSM-talk] Administrative boundaries (UK)
>
>> From: Shaun McDonald <shaun at shaunmcdonald.me.uk>
>> Subject: Re: [OSM-talk] Administrative boundaries (UK)
>> To: Bob Hawkins <bobhawkins at waitrose.com>
>> Cc: talk at openstreetmap.org
>> Message-ID: <48B2D302.9000503 at shaunmcdonald.me.uk>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Hi Bob,
>>
>> Use the information on the ground. You will usually find signs welcoming
>> you to the new area. It may be a few hundred metres either side, so look
>> for the change in tar quality. You may also find that bin mapping is an
>> option since the council often puts their name on the bins. (In Ireland
>> you need to do bin mapping to get the names of the streets, rather than
>> the boundaries).
>
>Old (NPE) OS mapping is good. I was amazed to find how little of the county
>boundary had changed in the past 50 years. I would use local knowledge and
>a
>variety of current (possibly copyright) sources to see if the old OS maps
>were still current and then digitise off the old maps. For my county the
>majority of the boundary was along rivers anyway (which I also entered from
>old OS (NPE) maps.

Agreed, except it tends to break down for the big urban centres where the
original county boundaries made way for the metropolitan districts. I can
bring the county boundaries into Birmingham from NPE very easily but
defining the boundaries within the urban area for Birmingham, Sandwell,
Walsall, Solihull etc needs the bin and recycle box approach, which I have
to say works remarkably well.

Cheers

Andy

>
>The borough boundary however defeated me; It has changed considerably and
>for the majority doesn't follow any recognisable features on the ground so
>I
>don't have any usable source for that at the moment and have left it alone.
>
>It is possible that where it is not clear that it doesn't really matter
>much
>anyway (certainly not 200 meters either way), and that where it is in urban
>areas one should be able to get it on or between the appropriate roads. I
>might return to the borough boundary some time and have another go. I might
>ask a borough councillor to draw the boundary on my paper map and then
>transcribe it.
>
>
>Regards,
>
>
>
>Peter
>
>>
>> Shaun
>>
>> Bob Hawkins wrote:
>> > I wonder from where most people obtain their administrative boundaries
>> > to digitise for OSM?  The most prevalent source is Ordnance Survey,
>> > but that current data is copyrighted, of course.  I am particularly
>> > interested in civil parish boundaries, then in local authority
>> > boundaries to build up areas of interest and coverage.  Can anyone
>help?
>> >
>> > With regards,
>> >
>> > Bob Hawkins
>> > -----------------------------------------------------------------------
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