Hawaii (Big Island) seems to be affected by the same or similar displacement:<div><br></div><div><a href="http://www.openstreetmap.org/?lat=19.09422&lon=-155.78022&zoom=15&layers=B000FTF">http://www.openstreetmap.org/?lat=19.09422&lon=-155.78022&zoom=15&layers=B000FTF</a></div>
<div><br></div><div>-Scott<br><br><div class="gmail_quote">On Tue, Sep 29, 2009 at 11:42 AM, Dave Hansen <span dir="ltr"><<a href="mailto:dave@sr71.net">dave@sr71.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On Tue, 2009-09-29 at 11:20 -0700, Scott Atwood wrote:<br>
<br>
> I spot checked a number of locations all around Maui, and in all the<br>
> locations I checked, they seem to be affected by the same or highly<br>
> similar offset to the NNW. Here is another example from the Lahaina<br>
> area:<br>
><br>
> <a href="http://www.openstreetmap.org/?lat=20.88606&lon=-156.68522&zoom=15&layers=B000FTF" target="_blank">http://www.openstreetmap.org/?lat=20.88606&lon=-156.68522&zoom=15&layers=B000FTF</a><br>
<br>
</div>If you can look into formalizing this, I'd be willing to take a look at<br>
it. What I mean is to take some precise measurements from a wide set of<br>
samples across the island, probably 20 or 30. Figure out what the<br>
displacement vector is at each point, and ensure that it *is*<br>
consistent. The worst thing we could do would be to perform such an<br>
edit and later realize that we've hurt more than we've helped.<br>
<br>
I'm just really hesitant to go moving an entire island worth of data<br>
based on the problem I've seen so far.<br>
<div class="im"><br>
> The prospect of manually shifting every single street on the entire<br>
> island of Maui (even in batches within JOSM) is extremely daunting,<br>
> and strongly inhibits me from wanting to do any work on Maui. And the<br>
> fact that such enormous errors persist suggests to me that few if any<br>
> people have done much non-automated work on Maui yet.<br>
<br>
</div>The question is whether it will take longer for people to do it manually<br>
or if doing it in an automated way will be more efficient. Believe me,<br>
the prospect of doing a mass edit like that is pretty daunting as well.<br>
<div class="im"><br>
> Can we verify how much editing has been done on Maui? If it is as<br>
> little as I think, there is little to loose by throwing away the<br>
> existing data and starting over. I still think re-importing (or some<br>
> kind of automated batch editing) might be a faster and easier way to<br>
> fix the problems with Maui.<br>
<br>
</div>Sure. Just download the entire island and see how many objects have<br>
been touched by people other than DaveHansen. JOSM can tell you this<br>
pretty quickly.<br>
<font color="#888888"><br>
-- Dave<br>
<br>
</font></blockquote></div><br><br clear="all"><br>-- <br>Scott Atwood<br><br>Cycle tracks will abound in Utopia. ~H.G. Wells<br><br><br>
</div>