Mateusz Konieczny via Tagging <tagging@openstreetmap.org> wrote:
> May 25, 2020, 02:45 by a...@thaw.de:
>> 
>> [access=private driveways implicitly permitting delivieries to destination?]
>> 
>> Not all deliveries are actively requested, and the delivery person can't 
>> know if you requested it or not.
> 
> Good point. Maybe it can be argued that there is implicit permission for 
> delivery services?
> My uncle has farm, with clearly private yard (it is unsigned).
> 
> Postman or package delivery would be welcomed there and - even if package 
> would not be requested, but random person driving to
> front of his house would not be and AFAIK would violate law.

I think what you're describing is access=destination, not =private.


> [...]
> 
>> FWIW, I'm less happy with the current state of the access=private page. But 
>> I'm not sure if consensus exists to clarify it.
> What is wrong and how you want to change it?

It does not specifiy precisely what the tag value =private means. It also 
doesn't make a clear enough distinction between private ownership and private 
access (by using the term "private" colloqiually and by showing a picture of 
what looks like an ownership=private situation).


To stick with driveways, consider yesterday's posts by Colin Smale and Florian 
Lohoff on this topic on OSM-talk. [1][2] It seems to me that to a degree, both 
points of view can be backed up by the current text on the access=private wiki 
page. [3] That suggests the wiki page doesn't describe the tag in a 
particularly useful way.

I think the earlier example of a nuclear power plant was a useful one. We 
clearly need a tag value that means: Absolutely no access unless by explicit 
prior permission. Currently, =private seems to fill that need. That would mean 
the definition of =private cannot include any kind of "implicit" permissions. 
Those would need another tag value. Implicit permissions should probably be 
treated by routers similarly to =destination, so perhaps =destination (or 
=permissive) could simply be used in such cases?

A side-effect of requiring explicit permissions for =private is that =no and 
=private are almost exact synonyms. (The =private wiki page already points this 
out.) Therefore, an alternative might be to give the meaning "explicit prior 
permission required" to =no, while allowing implicit permissions for =private. 
This would seem like a major change though, and I'm not sure I'd agree with it.


I think the =private wiki page could be improved by clarifying that =private 
really does require _explicit_ prior permission. The "Facilities" section 
already mentions "a closed group of users", which implies just that, but 
evidently this isn't very clear.

Additionally, the language generally could use a bit of cleanup, the relation 
to alternatives like =destination should be mentioned, and the picture should 
be like a "no trespassing" sign (ideally something that works for most 
jurisdictions).

(I might take a swing at this if I find the time.)


[1] <549c82c01046d2acd1ad8d41ca408...@xs4all.nl>
https://lists.openstreetmap.org/pipermail/talk/2020-May/084774.html
[2] <20200525181730.6rbnfqyygw3yt...@pax.zz.de>
https://lists.openstreetmap.org/pipermail/talk/2020-May/084791.html
[3] 
https://wiki.openstreetmap.org/w/index.php?title=Tag:access%3Dprivate&oldid=1986562

-- 
Arne Johannessen
<https://wiki.openstreetmap.org/wiki/User:Arne_Johannessen>


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