[OSM-newbies] Updating already uploaded data

[Mark Williams]

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Jason Reid wrote:
> Bob Jonkman wrote:
>> Hi all:  I spent the weekend cycling all over town, collecting map 
>> tracks. Sunday night I tagged and uploaded it using JOSM, and saved the 
>> file. 
>>
>> Yesterday I corrected a few small errors (node positions) and added 
>> some additional tags (footpaths, playgrounds), and re-saved the file.
>>
>> Can I upload the same file with the updates?  Will OSM create duplicate 
>> nodes, or does it recognize a moved node?
>>
>> Thanx,
>> --Bob.
>>
>> -- -- -- --
>> Bob Jonkman <bjonkman at sobac.com>         http://sobac.com/sobac/    
>> SOBAC Microcomputer Services              Voice: +1-519-669-0388       
>> 6 James Street, Elmira ON  Canada  N3B 1L5  Cel: +1-519-635-9413
>> Software   ---   Office & Business Automation   ---   Consulting
>>
>>
>>   
> You can upload from the same file. When JOSM uploads a new node (or way, 
> or relation) it saves the ID that the server generates in the file, and 
> thats sent with the object if you modify it locally and upload it again. 
> However one thing that is suggested to do before you upload, especially 
> if some time has passed, is to just download the area in JOSM again, 
> just in case someone else has modified things in the meantime. If there 
> are any conflicts JOSM will prompt you and you can choose which version 
> to keep.
> 
> -Jason Reid
> 

Agreed, however don't use that saved file to upload from again - it will
have saved all the recent edits with a flag, and if you load it, make
more edits, and THEN upload again you WILL get duplicates - better to
upload then save, which gets rid of the flags, and / or download it
again. It survives a single 'save with edits' OK, but it is possible to
beat the system!

Also if you keep a file & edit from that, you will miss any other edits
as stated, + the user feature won't show you as editor of your points,
as it only picks that up on download.

Mark
(Been there, done that..)
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