At 2010-07-16 21:55, Steve Bennett wrote:
On Fri, Jul 16, 2010 at 2:57 PM, Richard Welty <rwe...@averillpark.net> wrote:
> from a data modeling perspective, though, it's redundant and thus creates
> the opportunity for inconsistency and unresolvable error.
Do "data modelling perspectives" normally deal with folksonomies
though? By its very nature, the data entered by OSM editors is far
more susceptible to inconsistency than, say, a corporate database.
I really worry about the long-term effects of this, though. Eventually, if
renderers have to deal with all those duplicate (and not-quite-duplicate)
cases, they will slow to a crawl. Shouldn't we at least try to stem this
where we can?
The current planet tagwatch has 19243 different keys, and shop, leisure,
and amenity have over 1000 values each. Many of these are mis-spellings,
capitalization errors, import-source-specific tags, etc., <rant>but it also
seems like a lot of people aren't bothering to search for existing tags for
what they want to map - they just make something up, often without even
consulting a dictionary - as if nobody else in the world had ever tagged a
fast-food joint or shoe store. </rant>
This is not a great comparison, but it's all I have access to at the
moment. If I use the US tagwatch from 20091206, and look only at keys
starting with lower-case letters and that do not contain colons, there are
just 1650 such keys. By comparison, the 20100707 planet tagwatch has 7223
such keys. If someone has the last US tagwatch, we could do a better
comparison, but there does seem to be a growing problem here.
--
Alan Mintz <alan_mintz+...@earthlink.net>
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