Robin Paulson wrote:
can someone explain a few things about the way boundaries work, and
their relation to the is_in key?
as far as i can tell, when a location (say the suburb of balham, in
london) is added to the map, the is_in tag needs to be set, multiple
times. in this case, it would be set as follows:
is_in:Westminster (...i think)
is_in:greater london
is_in:england
is_in:united_kingdom
is_in:British_Isles
is_in:Great_Britain
is_in:Europe
...etc.
which seems counter-intuitive, not to mention requiring huge amounts
of work. do we set this for every item - roads, churches,
supermarkets,....thousands of other items?
What I do is putting is_in only on places and I do it rather like
this: Westminster,greater london,england,united_kingdom,etc. Even
when I map a few villages in an areay JOSM autocompletes that.
my second, related, point concerns boundaries that coincide with
coastlines: do we need to trace over the coastline of a
country/city/suburb to define an unbroken loop for each administrative
areas,
After reading
http://wiki.openstreetmap.org/index.php/Key:boundary
http://wiki.openstreetmap.org/index.php/Talk:Key:boundary#Expanded_usage
I would not bother.
What is more important to me, and this is question for all who know,
how to cope boundaries *between* two areas, like administrative
ones? How to cope with boundaries of different administrative
levels? If a line is a boundary between communes it is also a
boundry of respective provinces.
Both webpages above seem to be quite vague about it, or at best
unofficial.
--
Było mi bardzo miło. Czwarta pospolita klęska, [...]
>Łukasz< Już nie katolicka lecz złodziejska. (c)PP
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