[Tagging] Planning route in the shade during hikes either in urban areas or forests

[Mateusz Konieczny]

5 Jul 2021, 11:57 by bkil.hu+Aq at gmail.com:

> Consider the interpretation of shade=* as being a cuisine of lit=*. We
> don't split a sidewalk around every street lamp to indicate high
> brightness and again split it around each and every tree and bush that
> could cast a shadow on the sidewalk
In cases where badly installed lamps havedark parts between them I splitroad/footeay into lit=yes lit=no segments (yes, it is a bit subjective what counts as not lit)

The difference is that

- in case of placing lamps the goal is ofmaking entire stretch of easy lit,something else happens in case of someweird plans or deep incompetence

- lamps put light in one direction, notsubject of rotation like most shades are

> You may do it foryour particular neighborhood, but as its cost is prohibitive (like100x-1000x as shade=*)

For what? In case of shade from buildingswhere shade depends on time of yearand day I am curious how you would eventag using it with shade.

For building 30m high it will vary significant 
shadow deeply changing during day and year.
 
> As not many map or photograph at night, we
> don't even know whether the lights are working. 

In such cases where it is likelymapping it without verification during nightis a bad idea and not helpful
> - imported government data about buildings (though not always the
> height, roof shape and other minor quirks of its geometry),
>
Mapping approximate height of buildingcan be done by surveying.
See StreetComplete
> - imported data about trees (along with taxon, age and height)
>
Tree size should be estimatable by measuringit's trunk diameter and species.

Still easier than mapping whether it shadesroad depending on time of day and year.
> - width of the sidewalk/footway
>
Doable with measuring tape, though notsure why it would be needed
> But how common is it that one would have all required data?
>  
>
More likely than mapping shade= in waythat would actually work given thatshade changes during day
>
> Around
> here, none one of these are available and thus most of the map is
> blank in this aspect.
>
Nearly all are mappable by survey if
someone wants.

Mapping them will take less time thanputting shade=* tags.

Are you in place where somehow placesare always shaded or almost never?

In my area deciduous trees, changing
sun location etc result in shade changingmassively during year.

Mapping shade=* would require unusuallycomplex conditional syntax and ridiculous way splitting.

Single 10 storey building would requirefootways split every 10cm around it(towards East, West, North from it)
or such shade=* tags would be useless.
That sounds like horrific idea that shouldbe considered as ridiculous, unusuable,
not worth encouraging and bad idea.

Given bench or footway piece can be in shade or in direct sun.
With timing changing by year and day.

If you mark edge of shadow with stoneand wait just few minutes you can seehow edge of shadow moved.

(works best for stark edge, with buildingsrather than blurry edge of a tree shadow)
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