[Talk-us] Tiger 2007 Data

[Karl Newman]

On Tue, Oct 28, 2008 at 7:12 AM, Nick Hocking <nick.hocking at gmail.com>wrote:

> "Well, #2 would be nice but it would be tricky to detect a collision with
> an
> existing way. Frankly, because the first TIGER import was done, the number
> of completely new ways that would be added in a new import would be small,
> and the number of those ways that conflict with ways added manually by
> editors would be even smaller. So, I think it's a small sacrifice to have
> to
> remove a few duplicated roads in exchange for county-wide improved
> accuracy."
>
> Karl,
>
> I agree #2 could be tricky but I believe it is essential.
> I don't think you can corrupt someones edits and then say to them
> "sorry, we decided to sacrifice your hard work because we determined
> that it was for the greater good."
>

I don't see it as "corrupting". It's not mangling the mapper's work in any
way. If they don't like the new overlapping road, then just delete the TIGER
one.

 It hope that is not the OSM way.
>

My sense is that "the OSM way" is "do it your damn self".


> Also I despute your statement of "a few" but notwithstanding that, this is
> not a numbers game......
>

I have to admit I don't have hard numbers to back up my statement, but
intuitively, how many roads would have been added in 2 years? I'm sure there
are some statistics somewhere stating the number of roads in TIGER 2005
(2004?) and in TIGER 2007. That would give a magnitude to the issue.

"gee officer - I only killed a few people - there are hundreds left" is not
> going to get you very far.
>

Really? You're going to compare overlapping ways with a capital crime?


> Still, I will say that if the numbers of duplicated way are so few then
> I think that the person who creates the duplicated ways should also
> fix them up. Then I'd have no problem with the uploads so long as rules
> 1 and 3 are also kept.
>

That goes back to *detecting* the overlapping ways. Can be done by JOSM's
validator, so maybe there's hope.

Maybe it could be done like Dave handled the last import--if anyone is
concerned about conflicts, they can handle their county themselves.

Karl
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