[Talk-GB] Tagging of British canals.

[Dave F.]

Richard

After seeing your edits I started a discussion on the Tagging forum (as 
canals & water features are, obviously worldwide) to see if your 
amendments were correct.

This wiki page was pointed out to me:
https://wiki.openstreetmap.org/wiki/Proposed_features/Water_details

As you can see it's been discussed & in use for a few years.

I was never really happy with the riverbank tag especially as it was 
used as a 'cover all' solution, so the proposals in this wiki are 
beneficial.

A response from that discussion which clinched it for me:

"The advantage is that you can determine it is a canal from the polygon 
alone. With waterway=riverbank you have to find the corresponding 
centerline first (assuming it exists)."

I've now amended most of the rivers/canals in my area to suit.

"and IMHO very poorly"

Really sorry to say this, but some of your edits have been a bit off. In 
JOSM do you load all the data in the area you're editing? I've noticed 
you move whole entities, such as fences, but seem unaware that action 
affects any joined elements like other fences or footpaths.

You amended locks that are on rivers to waterway=canal which IMO is 
incorrect:
http://www.openstreetmap.org/way/39910760

Also which imagery are you tracing from?  In some cases it appear to 
vary from Bing in Potlatch.

Cheers
David F.

On 06/08/2014 19:17, richard wrote:
> Firstly a disclaimer, I am mostly an armchair mapper.
>
> I am working my way around the canals of Britain, tracing the canal banks and
> tidying up locks etc. (I have probably seen a dozen different ways that locks
> have been tagged.)
>
> I started off tagging the canal banks as
>
> waterway=canal+area=yes
>
> but it was pointed out to me by another mapper that this was confusing
> renderers and was pointed to the Wiki entry that suggested they should be
> tagged as
>
> natural=water+water=canal
>
> I therefore changed my existing tagging to reflect this and tagged my
> subsequent tracing this way. I have come across a few areas that have been
> traced by others (Mostly a long time ago ) that have been
> tagged as
>
> waterway=riverbank
>
> and I have changed these as I have realigned them.
>
> Today I have had a critical message from another mapper who said among other
> things,
>
>
> "Wide-ranging changes to existing tagging schemes, just because you read a
> Wiki page is not good enough."
>
> I have two problems with this sentence,
>
> 1/ My CHANGES have not been what I would consider wide ranging as most of the
> mapping has been done by myself therefore new not changed.
>
> 2/ If the reading of a Wiki page is not good enough then why bother having a
> wiki? Do we have to resort to the mailing list every time we want to tag
> something?
>
> If there is an "accepted" way to map canals can someone point me to it?
>
>


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