>I have been doing some tidying based on Osmose, including the warning for 
>highway=footway foot=yes, which is often left over >from a preset in Potlatch 
>1.
>
>https://www.openstreetmap.org/changeset/87672607
>
>I got a changeset comment querying the edit.

Hi Andrew,

My understanding is that highway=footway with no access tags has an implied 
foot=yes. This, however is entirely different from highway=footway + foot=yes 
which explicitly states that access is allowed. Without the explicit tag, 
whilst routing will be the same, it could just be that the mapper adding the 
path did not know whether access was allowed. In my view, if there is a rule 
check, it should be checking that there IS either a foot= tag or an access=tag 
and warning if there isn't. For me however, the biggest problem is ways tagged 
with highway=footway, access=no and foot=yes - this really should be warned 
about, as without reading the change history and notes it is not possible to 
determine whether the access=no was intended to indicate that other access than 
foot is disallowed (which is superfluous) or was added to say the path has been 
closed, forgetting that foot=yes will override it. The feedback comment 
mentioned 'designated' - I think foot=designated should ideally only be used in 
conjunction with the designation= tag, as otherwise you don't know what 
designation designates the access. There are also lots of ways tagged with 
values of 'designated' for transport modes where the mapper had an incorrect 
understanding of what it meant, so without the accompanying designation tag, 
these values should be taken with a pinch of salt.

Regards,
Mike


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