[Tagging] lit=yes/no threshold

[Warin]

On 06/07/19 20:47, Ferdinand Schicke wrote:
>
> What I couldsee work would be to have additional lit=* values like 
> lit=weak or lit=spillover or lit=10lux
>

I tired to use my mobile phone to gauge the amount of night light .. it 
did not work very well at all!

lit=weak is too subjective.

I too would leave lit alone. Either it is lit or it is not.

If you need some measure of 'lit' then I suggest if a map (OSM 
reference) cannot be read by the present light level then it is not lit.


> *From: *Mateusz Konieczny <mailto:matkoniecz at tutanota.com>
> *Sent: *Samstag, 6. Juli 2019 12:26
> *To: *Tagging <mailto:tagging at openstreetmap.org>
> *Subject: *[Tagging] lit=yes/no threshold
>
> Some cases of lit=yes are clear (direct lighting of street/footway by 
> lamps)
>
> Some cases of lit=no are clear (no lighting whatsoever)
>
> But in cities there is also often strong or weak ambient light, for 
> example:
>
> - carriageway is directly lit with so powerful light that spillover light
>
> makes footway well lit - clearly lit=yes
>
> - spillover light is quite dim but enough to comfortably walk - also 
> lit=yes
>
> - there is some ambient light, but not enough to walk without own
>
> source of light - lit=no
>
> - there is an ambient light, one can carefully walk, but only slowly,
>
> people with poor eyesight needs their own source of light - lit=no (?)
>
> Overall, I am considering adding to 
> https://wiki.openstreetmap.org/wiki/Key:lit
>
> recommendation to consider "is it necessary to bring your own light 
> source to see it properly"
>
> as recommended threshold for footways/paths.
>
> Any problems with that or ideas for a better threshold between lit=yes 
> and lit=no?
>
> disclaimer: I am trying to make lit=yes/no definition more precise as 
> part of my grant
>
> https://www.openstreetmap.org/user/Mateusz%20Konieczny/diary/368849
>
>
>
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