[Talk-GB] maxspeed changes

[Gregory Williams]

>From: petermiller63 at gmail.com [mailto:petermiller63 at gmail.com] On Behalf Of
Peter Miller
>Sent: 20 September 2012 17:23
>To: Gregory Williams
>Cc: Chris Hill; Talk GB
>Subject: Re: [Talk-GB] maxspeed changes
>
>>On 20 September 2012 16:59, Gregory Williams
<gregory at gregorywilliams.me.uk> wrote:
>>> -----Original Message-----
>>> From: Chris Hill [mailto:osm at raggedred.net]
>>> Sent: 20 September 2012 16:27
>>> To: Talk GB
>>> Subject: [Talk-GB] maxspeed changes
>>>
>>> It seems that PeterITO is once again making changes to speed limits,
this time
>>> changing limits that are tagged maxspeed=national to
>>> maxspeed=60 mph. The signs I see ( the round white sign with the black
>>> diagonal bar) does not say 60 mph it says national speed limit.
>>> Therefore I believe PeterITO is wrong to make the changes. Furthermore,
he
>>> seems to making them over a wide area which makes it an undiscussed mass
>>> edits and should probably be reverted as such.
>>>
>>> PeterITO, please explain what you are doing.
>>Presumably Peter is also adding source:maxspeed=UK:nsl_single, therefore
>>preserving the fact that the maxspeed data represents the national speed
>>limit at that point, rather than being explicitly signed as 60 mph?
>>Certainly that's how I tag national speed limits on single carriageways
here
>>in Kent.
>
> Correct. I did however use alternative maxspeed:type at times which also
> appears in the DB and which I feel is better than source:maxspeed which to
> my mind should be used for  'source:maxspeed=survey' or
> 'source:maxspeed=local authority spreadsheet-Dec12' or similar.
> However... lets leave that discussion to another day but either way not
> information has been lost by my edits and the data has been made more
> consistent.

That seems logical enough reasoning to me. I've just fallen into using the
source:maxspeed pattern really, but could quite easily use maxspeed:type
instead.

> Fyi, I changed one instance of 'maxspeed=30 mph;30mph' in Kent to
> 'maxspeed=30 mph' and left the instance of 'maxspeed=12 mph' alone
> (even though it does seem a bit unlikely).

Yep, I guess I or someone else merged two road sections together and just
didn't
notice the subtle difference in the tags. I used to use the 30mph form but
now use
30 mph, so it's fairly easy for this to have accidentally happened here in
East Kent.

I know where the maxspeed=12 mph is (at least I guess we're talking about
the
same instance :) ). It's a private estate on the edge of Whitstable and
really does
have that unusual speed limit.

> Re ITO Map, we have recently enabled 'clicks' on many of them. Click on
any
> coloured elements on the speed limit fixup map to see what the tagging
> currently shows. Many other maps also now support clicks.

That could be useful sometimes. Thanks.

> Finally. Be aware that we are still in the process of updating ITO Map
following
> the license change. If it is not updated tonight it should hopefully do so
tomorrow.
> It should then update daily. As such the speed limit fixup map still shows
the
> state of OSM before I made any changes.

I thought that'd be the case. You've got much more processing to handle than
when
I switched over my cycle parking heat map over to data post the license
change, so I'm
not surprised that it's taking several days. I look forward to seeing the
updates in all of
the ITO products for OSM. I use them frequently, and have even used them to
help
make my case when writing planning representations :-)

Gregory