Re: [Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-21 Thread David Davis via Talk-gb-london
OK, I did a little more reading but it turns out that the actual order ( https://www.legislation.gov.uk/uksi/2022/37/note/made ) simply says 'the new ward boundaries are those shown on the map in the Commission's office ... and here's a link to an electronic version of the same map' which

Re: [Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-21 Thread David Davis via Talk-gb-london
Just to be clear though Colin, in that particular instance when I said the position of the railway line looked rather dodgy, that was when comparing a high degree of congruence between Cadastral Parcels and the satellite imagery (roads and buildings) and the adjacent railway lines cutting through

Re: [Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-21 Thread Colin Smale
If the position of the boundary is imported from a source that ultimately has a very high precision, for example Ordnance Survey or a Council's GIS system through a shapefile or similar, then the location as recorded in OSM will likely be more accurate than what would be obtained from tracing

Re: [Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-21 Thread David Davis via Talk-gb-london
well, I did the first one! (Brixton Acre Lane) https://www.openstreetmap.org/relation/13817756#map=15/51.4573/-0.1225 (Did I do it right...?) It didn't actually take very long. For the most part, I was able to simply tag roads with the relation. For a few more outré bits where the ward boundary

Re: [Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-17 Thread David Davis via Talk-gb-london
Yeah Tom, this is conclusion I reached too: if a ward boundary is legally defined as being a particular geographical feature (e.g. centre line of a road) then it is better to have that way on OSM tagged with a relation (even if its position is a metre or two off perfect) rather than have another

Re: [Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-16 Thread Russ Garrett
My controversial opinion is that these shouldn't be in OSM. The definitive boundaries are freely available as open data in OS Boundary Line (although they won't usually appear there until after the boundaries take effect). The current UK-wide coverage of ward boundaries in OSM is pretty minimal,

[Talk-gb-london] Anyone up for the task of mapping the new Lambeth electoral ward boundaries?

2022-02-16 Thread David Davis via Talk-gb-london
Hello, a complete revamp of the electoral wards in Lambeth borough comes into effect in May 2022, with 25 new wards. (See https://love.lambeth.gov.uk/a-new-political-map-for-the-2022-lambeth-borough-council-elections/ for info). I'm guessing the boundaries are available as open data, and some