[Tagging] Sidewalks and cycleways as tags vs as extra lines

[Andy Townsend]

On 16/01/2018 10:17, "Christian Müller" wrote:
> But a simple
> (read ideally one or two tags) attribute that enables data users to
> bisect a set of motorized ways by the sidewalk or sidepath property
> may simplify a lot of queries.
>

sidewalk=separate is currently used a fair bit to indicate that "there 
is a sidewalk mapped separately, with its own tags on it": 
https://taginfo.openstreetmap.org/keys/sidewalk#values . Unfortunately 
the values used for cycleway are a bit more complex: 
https://taginfo.openstreetmap.org/keys/cycleway#values - it's not clear 
to me which of those tags have the meaning "X is mapped separately", 
with the possible exception of the relatively low use 
https://taginfo.openstreetmap.org/tags/cycleway=separate .

"sideride" is used even less, undocumented, and doesn't mean anything in 
English (so it's difficult to even guess what it might mean).

"replacing" sidewalk=* with e.g. sidewalk:left=* is not a good idea 
since there are 1,186,931 existing objects.  For comparison 
https://taginfo.openstreetmap.org/keys/sidewalk%3Aleft shows only 504 uses.


Best Regards,
Andy