[Talk-scotland] Edinburgh 20mph Limits

Robert Weetman robert.wtman.88 at gmail.com
Wed Mar 1 22:25:44 UTC 2017

My thoughts would be...

a) you could argue that you are only taking the speed limit information 
from the mapping, which probably wouldn't be seen as copyright (coming 
from the council not the Ordnance Survey). I doubt that anyone in the 
council has considered making this open data... busy people etc.

b) BUT I suspect that there may be variation on the ground in terms of 
where speed limits actually change - that there may be some considerable 
variation between what was planned at a high level (and is therefore 
shown on the mapping) and exactly what will have been installed.

With b in mind I'd tend to want to do a survey based on the mapping... 
but I must admit to being more daunted than for Edinburgh's city centre 
20mph zone. Could someone draw a polygon (saved in appropriate format - 
e.g. kml) to define where the edges of the zones should be? That would 
make it a more realistic prospect to survey. The city centre survey 
became complex where there were existing 20mph zones - one zone merging 
into another. I'd guess the potential for the same this time is greater.


On 01/03/2017 18:52, Donald Noble wrote:
> Well the next section of this roll out (phases 2 & 3) should now be in 
> force, so it would be good to get the map updated...
> I have just updated the streets in Marchmont I know have changed [1], 
> but have not done any on the ground surveys yet to cover the wider 
> extents.
> I cannot find a list of streets that are covered by the new limits, 
> which would presumably be open data. The council GIS portal [2] that 
> shows all the streets that have/will change does not have any 
> copyright information on it.
> What are people's thoughts on whether this dataset is appropriate to 
> update OSM, or does it need an on the ground survey to check?
> Cheers, Donald
> [1] although I think there are still a few signs to sort, notably at 
> the southend on Blackford Avenue, which I have reported as missing.
> [2] 
> http://edinburghcouncil.maps.arcgis.com/apps/webappviewer/index.html?id=ca131eddb0084197b160edbbad2ca8c7 
> On Sat, 30 Jul 2016 at 11:33 Robert Weetman <robert.wtman.88 at gmail.com 
> <mailto:robert.wtman.88 at gmail.com>> wrote:
>     I've created an Overpass query to show the live speed limit data.
>     See here:
>     http://overpass-turbo.eu/s/hAJ
>     On 26/07/2016 15:03, me at chrisfleming.org
>     <mailto:me at chrisfleming.org> wrote:
>     > I've just realised that the 20mph limits in the first 2 zones in
>     > Edinburgh come into force from the 31st of July.
>     >
>     > Given that the signs are now in place, I think it would make
>     sense to
>     > try and map as much of the change by/on the 31st July.
>     >
>     > To try and co-ordinate things I've setup a tasking manager and
>     added a
>     > task for the city centre zone at:
>     > http://tasks.openstreetmapscotland.org/
>     >
>     > If this is useful, then I will add the Queensferry Square.
>     >
>     > ITO maps have a map of current speed limits at:
>     >
>     http://product.itoworld.com/map/124?lon=-3.20365&lat=55.94420&zoom=13
>     >
>     > more info on the changes on the council website:
>     >
>     http://www.edinburgh.gov.uk/info/20243/20mph_for_edinburgh/1024/about_20mph_for_edinburgh
>     >
>     > (at some stage they had a list of streets on the website, although I
>     > can't find it at the moment)
>     >
>     > Cheers
>     > Chris
>     >
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