[OSM-talk] An example of the complications inherent in determining tainted ways

Jean-Marc Liotier jm at liotier.org
Thu Dec 15 11:59:50 GMT 2011


On 15/12/2011 12:40, David Groom wrote:
> ----- Original Message -----
> From: "Toby Murray" <toby.murray at gmail.com>
> Sent: Thursday, December 15, 2011 4:47 AM
>> User "moonwashed" created this way by splitting it from a TIGER way.
>> He made several more edits to it but the last 20 versions have been by
>> agreeing users (including both NE2 and myself) and while that page
>> doesn't show node position changes, I have verified that every single
>> node has been moved since moonwashed last touched it.
>
> But do you know what the source was for moving each node? As has been 
> said earlier, if each node was simply moved by a tiny amount away from 
> the position created by moonwashed, and the new position of the node 
> was not determined by reference to some other source (Bing or GPS 
> maybe), then the new nodes are derived form moonwashes edits
But what if the source changes ? When I use high-resolution imagery to 
improve areas formerly mapped from low-resolution imagery, I change the 
source tag - i.e. from "Yahoo low resolution satellite" to "Microsoft 
Bing satellite". Since my edit is correlated with a change of source, 
shouldn't it be considered a break from being a derivative ?




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