Maybe anything that touches I'd < 10 or something gets automatically banned and 
an email to the user?

Steve

stevecoast.com

On Apr 10, 2011, at 10:03, Tom Hughes <[email protected]> wrote:

> On 10/04/11 17:47, Jochen Topf wrote:
> 
>> GET http://api.openstreetmap.org/api/0.6/node/1/history tells me this:
>> 
>> <osm version="0.6" generator="OpenStreetMap server">
>>     <node id="1" lat="2.0" lon="2.0" changeset="9257" user="τ12" uid="1298" 
>> visible="false" timestamp="2006-05-10T18:27:47Z" version="1"/>
>>     <node id="1" lat="50.1249473" lon="14.4557581" changeset="196013" 
>> user="tacut" uid="113502" visible="true" timestamp="2009-04-04T10:01:54Z" 
>> version="2">
>>         <tag k="name" v="Metro C - Kobylisy"/>
>>         <tag k="wheelchair" v="yes"/>
>>         <tag k="railway" v="subway_entrance"/>
>>     </node>
>>     <node id="1" lat="2.0" lon="2.0" changeset="524633" user="woodpeck" 
>> uid="5164" visible="true" timestamp="2009-04-14T15:42:57Z" version="3"/>
>>     <node id="1" lat="2.0" lon="2.0" changeset="1767082" user="Ldp" 
>> uid="48796" visible="false" timestamp="2009-07-07T22:44:41Z" version="4"/>
>> </osm>
>> 
>> How exactly am I to interpret this? Why are some visible="true" and some
>> visible="false"? The visible="false" on the last version tells me the node
>> is deleted. But what happened before? Does the visible="false" on the first
>> version mean it was deleted before it was re-created as version 2? For a
>> deleted node, does the timestamp refer to the creation or the deletion?
> 
> Here goes...
> 
> The real node 1 should be somewhere in the Regents Park area of London but it 
> has a history of being accidentally changed by badly written imports and bots 
> which just make up IDs starting at 1 and things.
> 
> It looks like in May 2006 it was deleted - it was already at a silly location 
> so had probably already been the victim of a rogue client. We have no history 
> before that online because history was wiped when we went to api 0.5 in 
> October 2007.
> 
> It was then resurrected by somebody uploading a valid node 1 in April 2009 
> (just a few days before api 0.6 went live with version checks to make these 
> accidental overwrites harder).
> 
> Frederik obviously noticed this and reverted that changeset, moving the 
> object back to it's previous position again but not actually marking it as 
> deleted. Eventually Lennard came around and deleted it again.
> 
> If you look at changeset 196013 you'll see it is just an upload of nodes 1 
> through 17 so a classic bad import. Those 17 nodes are then moved back again 
> in Frederik's changeset.
> 
> Tom
> 
> -- 
> Tom Hughes ([email protected])
> http://compton.nu/
> 
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