[Talk-us] [Imports] [Talk-ca] TIGER considered harmful

[Peter Batty]

I would be interested in being on the USA conversion team - how do I sign
up? (I am in Denver incidentally)

On Sun, Nov 15, 2009 at 5:52 PM, Anthony <osm at inbox.org> wrote:

> On Sun, Nov 15, 2009 at 7:24 PM, Peter Batty <peter.batty at gmail.com>
> wrote:
> > I'm coming a bit late to this debate, but I just wanted to raise a fairly
> > basic question, which is whether the Karlsruhe schema is the best one to
> use
> > in the situation we find ourselves in with TIGER, where quite a bit of
> data
> > cleanup is anticipated.
>
> I signed up for the "USA 'conversion team'" with the express intention
> of challenging the use of the Karlsruhe schema.  Maybe you can sign up
> too (even if you're not in the US).
>
> > The main challenge with
> > maintaining this format, as Frederik and others pointed out, is if you
> split
> > or join a way. But it's relatively easy to put logic in editors to handle
> > that, and even if you have to do it manually, it seems to me easier to
> > maintain this model than the more precise Karlsruhe schema if you are
> doing
> > quite a bit of data cleanup.
>
> The TIGER data has already been significantly degraded from people
> doing just this type of thing.  The problem is, if a way goes from 2
> to 100, and you want to split it in the middle (say, due to a change
> in the number of lanes), you have to either resurvey the addresses or
> take a shot in the dark and split it 2-48, 50-100.  That might be
> reasonable if the 2-100 were accurate in the first place, but if that
> 2-100 were really 2-20, you've seriously screwed things up.  The TIGER
> data already contains large numbers of instances of exactly this, but
> there's no sense introducing a schema which makes this even worse.
>
> On the other hand, there are other possibilities which avoid this
> problem and also avoid creating multiple ways.  Join the conversion
> team with me and we can talk about them.
>
> > So this is not an either / or proposal of course - both forms could
> exist,
> > and you search for the more precise form before the more approximate
> form.
>
> As much as I hate the meme of saying +1 when you agree with someone, I
> have to say +1.  Or maybe "AMEN".
>
> On Sun, Nov 15, 2009 at 7:47 PM, Dale Puch <dale.puch at gmail.com> wrote:
> > I personally favor having the possible address range in the street way
> > segment (between intersections)
>
> Join the team!
>
> Anthony
>
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