[OSM-talk] GPX tracing from New Popular Edition Maps

[Etienne]

Nick
Why does it say you need to calibrate 4 times - is it averaging the error
for the four points?

You've tried to make the calibrate instructions clear:
select calibrate above, then click on a 4-way tile join (cross). Repeat for
each of the 4 joins.
and
You will need to click the calibration button again before entering the next
tile join.

But it still took me a while to figure out what I had to do.  Maybe saying
it four time would work better:

1 Click the calibrate button, then click on the top-left corner of a tile.
2 Click the calibrate button again, then click on the top-right corner of
the same tile.
3 Click the calibrate button again, then click on the bottom-left corner of
the same tile.
4 Click the calibrate button again, then click on the bottom-right corner of
the same tile.

(at least that is what *I* think the instructions are telling me to do - I
might be completely wrong).

Is there some way of resetting the calibration if you misclick in the wrong
place?  What happens if I calibrate twice near the same tile corner?

It might be useful to display the error for each point and then the average
error for each tile as a bit more feedback to the user.

Etienne



On 10/27/06, Nick Burch <openstreetmap at gagravarr.org> wrote:
>
> On Fri, 27 Oct 2006, Andy Robinson wrote:
> > What happens with calibration? I can see the error each time I calibrate
> > a tile cross but what is the significance? Does anything happen to use
> > this info?
>
> It uses it when generating the GPX file. It offsets all the points by that
> amount before converting them to lat+long
>
> Nick
>
> _______________________________________________
> talk mailing list
> talk at openstreetmap.org
> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk/attachments/20061027/4253c077/attachment.html>