On 01/09/2013 19:04, François Lacombe wrote:
2013/8/30 Ole Nielsen <on-...@xs4all.nl <mailto:on-...@xs4all.nl>>
Agree, the transformer is just a feature of the pole. I wouldn't tag
it as a substation.
According to
http://wiki.openstreetmap.org/__wiki/Proposed_features/__Substation_refinement
<http://wiki.openstreetmap.org/wiki/Proposed_features/Substation_refinement>
that is indeed how to do it. I see no problems in having an
alternative tagging of the transformer since the power key is
already used for the pole. For retrieval it is only slightly more
complicated than just searching for power=transformer.
It's already used for the poles but don't you think it's transformers
which deserve the most the usage of power=* ?
In this case no.
From an electrical viewpoint the transformer is of course important.
However, is this the most important aspect for the average user? You see
a pole in a row of poles and this particular one happens to have some
kind of lump attached to the top. It may be useful to tag this fact for
navigational purposes but it is otherwise of doubtful use. Very few
users will be interested in the details of that transformer or its
connections to the grid. Even when I'm interested in power grids myself
I don't find the lower voltage distribution grids particularly
interesting. Furthermore, it is mostly impossible to map the
distribution networks to any degree of completeness due to
undergrounding etc. Thus I can't see much need to develop an elaborate
tagging for this reason especially if it is not compatible with the
existing tagging practice. However, the average mapper may still want to
tag the transformer as an interesting feature of the pole. An additional
attribute tag (transformer=yes/*) will be sufficient for that and it
won't break anything. Data consumers can easily extract this information
if they need to.
Ole
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