sent from a phone

> On 6. Jul 2019, at 14:07, Tobias Zwick <o...@westnordost.de> wrote:
> 
> The least subjective definition is to map the physical presence of street 
> lanterns on the way, not the light they emit. (This definition (though) would 
> mean that a footway close to a lit street would be mapped as unlit as long as 
> it does not have own lanterns.)


the presence of street lights indicates the road could be lit, it has no 
implications whether it is actually lit. For example last summer I went to an 
island where all streets had relatively new street lights, but half the island 
they kept them off so that light pollution was reduced.

In small villages in Germany, street lights are often turned off at a certain 
time (e.g. after 23h), etc.


Cheers, Martin 
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