[Talk-ca] data replacement north east mississauga

[Richard Weait]

On Sun, Dec 11, 2011 at 11:03 PM, Steve Singer <ssinger_pg at sympatico.ca> wrote:
> On Sun, 11 Dec 2011, Richard Weait wrote:
>
>> On Sun, Dec 11, 2011 at 9:34 PM, Steve Singer <ssinger_pg at sympatico.ca>
>> wrote:
>
>
>>
>> The wiki will give some guidance on how to clean tainted objects.
>>
>> http://wiki.openstreetmap.org/wiki/Open_Data_License/What_is_clean%3F
>
> That page says
> ---
> A node moved by a non-agreeing mapper is tainted.
>
>    Clean that node by moving it. ---
>
> That seems to say that if the JOSM license check tool shows a node as orange
> then to fix it I just need to move that node a small amount.  That doesn't
> sound right.  I would think that I would need to either move it back to the
> nodes original position (to where the node was before the first non-ct
> editor touched it) OR place the node somewhere based on on independent
> source (bing, canvec, my gps traces,...).  I don't see how whatever tools
> OSM will use to ensure that database is ODBL clean in April will be able to
> tell the difference between those and a casual adjusting of a nodes position
> in the course of editing.  Isn't deleting/replacing the node from an
> independent source the safe thing to do?
>
> I would hate to spend time now 'fixing' now only to find out it three months
> that my fixes still left the data as  ODBL dirty.

We don't have to put the node back to it's original position.  If the
decliner was walking on the beach, we want to remove their footprints;
not put each grain of sand back where it was.

When we digitize a curve, there are many correct approximations.  I
wouldn't grab the way and move it 1cm to clean all the tainted nodes,
though that would clean them.  Similarly, I'll presume that the edit
that tainted that node was a legitimate edit; where will I put the 16
nodes to approximate this curve.  Not "I'll move this node 1cm to
taint it because I'm a license denier".