[OSM-talk] Identical Duplicate buildings

[Pierre Béland]

John,
I had similar experiment with JOSM when huge edit conflicts.  I dont know if this is because my changeset was closed before I finished revision / correcting all the conflicts (nodes + ways) and re-submit, but I did have duplicates that I had to remove.

 
Pierre 
 

    Le mercredi 27 janvier 2021 18 h 31 min 12 s UTC−5, john whelan <jwhelan0112 at gmail.com> a écrit :  
 
 That doesn't make sense to me.  I've done a lot of validation for HOT.  When validating I corrected and provided feedback but as far as I am aware there is no mechanism for me to reject the edits.
The thing that mystifies me is where the second buildings are coming from.  Once iD has put them up to the database then they should no longer be tagged as uploadable unless it is something really stupid like close iD down before it confirms the edits have been uploaded.  On that case iD will think they still need to go and next time it does an upload it will upload them again.
Would someone like to try it?
It's the sort of thing a new mapper might do not realising you must leave iD open until the upload is confirmed.
If this is the case and I strongly suspect it is the answer of course is simple.  Include in the instructions to wait until iD has confirmed the upload. 
Cheerio John
On Wed, Jan 27, 2021, 18:08 Ewen Hill <ewen.hill at gmail.com> wrote:

John,   I too have seen this in a number of HOTOSM projects. The buildings are identical and could not have been performed manually and appear duplicated. It also looks like this occurs potentially when a validator has rejected an edit and a new editor makes a change and submits it back for validation. I have removed up to 100 duplicated buildings in a cell that only JOSM validator showed up as there are no discernable differences. The quality of mapping and the mappers does not appear to be the underlying issue here.
Ewen
On Thu, 28 Jan 2021 at 05:59, john whelan <jwhelan0112 at gmail.com> wrote:

I'm seeing a large number from mappers who are using iD.  Typically mappers with less than 200 edits.  

#hotosm-task-278 on the change set for one group that stood out.
What puzzles me is it looks as if they are uploading the same information twice.  I note that sometimes two mapperid's are involved but it seems very unlikely that two mappers would incorrectly map the same building in an identical way. I don't think JOSM allows that but I don't know iD well enough.
Is there some guidance we can give to avoid the problem. 

Thanks John


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Warm Regards

Ewen Hill


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