On 7 April 2010 12:08, Andy Robinson (blackadder-lists) < [email protected]> wrote:
> What I'm meaning by verification is interrogating the boundary line with > the > features already mapped on the ground. In many cases we know where the back > of gardens are for instance, or the position of a water course, railway > line > or a parish boundary. Many other boundaries, including Ward boundaries, tie > in with these features. So, for example, if a boundary actually follows a > stream and the stream is in OSM, then logically our boundary should follow > the stream, even if the OS have a slightly different alignment for the > feature. > > Oh right, yes, I'm with you now. It does need to be imported, but can be checked and in places brought into line with other features *with great care *. In my experience most ward boundaries go between streets, down the middle of a street, along a natural feature such as a stream, parallel to a railway line, or quite often they just jump across "empty" space following no particular feature. They also sometimes switch from going down the middle of a street to taking in both sides, which will again mean mappers will need to be very careful about changing them. Tom -- http://tom.acrewoods.net http://twitter.com/tom_chance
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