[Tagging] [OSM-talk-be] generalized survey : proposed wiki update

[David Bannon]

Andre, sorry, I support what you are trying but not quite sure you have
the proposal ready yet. I cannot post to the Belgium list so assume you
see this on "tagging" ?

Can you please give a few examples of how the data would appear ? I
think that might clarify it. In particular, how you will datestamp data
derived from the wide range of sources likely to been used ?

Now, which wiki page do you propose to make this change to ? Is it
http://wiki.openstreetmap.org/wiki/Key:source  ?

Interestingly, its already contains the recommendation
"source:name=survey 10 November 2012" - I was not aware of that ! Of
course, that recommendation has two problems, the suggested date is a
non regular format and sort of implies its only used with "source:name="
not just "source=". 

Incidentally, I'd avoid the word 'mandatory' if I was you. Why not post
the words you propose to add to the wiki page ? eg -

Insert a new bullet under "How to Use" -
* "source=survey 2014-06-15" to indicate the date this data was know to
be current.

Alter the existing (second) bullet point to make it show an ISO date
format.

...Some discussion text about how use of a date is strongly recommended
and what it should be expected to mean....

David 


On Sat, 2014-06-14 at 19:03 +0200, André Pirard wrote:
> Hi,
> 
> Following this discussion here is a proposed clarification to
> Key:source.
> The goal is to define the word, make date mandatory, use ISO format,
> define per source tag meaning.
> Is there any objection or suggestion for changes?
> 
> survey yyyy-mm[-dd] (with one blank and an ISO 8601 format date) can
> be used within the data of any source.KEY=* or source=* tag to
> indicate that, on that date, the source(s) of KEY were the most recent
> and the data was verified to be correct for that KEY. In source=*,
> survey means the same for all possible (required) keys (even those
> absent by default), but it can be overridden by survey in some
> source.KEY tags. survey helps to avoid making already done
> verifications, especially because a source publication date is not a
> verification date. survey can contain the date of dateless sources
> like visual or knowledge. It can help humanly assisted bulk imports.
> Please update the survey date of what you verify (a substantial time
> later), even if you don't add survey dates yourself.
> 
> Suppose an *.osm file is built from an imported source.  The map
> contributors are requested to move/update  the map elements to osm.org
> after verifications such as coordinates.  If the *.osm map elements
> contain a survey value such as source=survey <import-date>, then a
> program can find out by checking for an equal or later survey date
> what map elements have been moved/updated to osm.org and hence build a
> remaining.osm file containing what remains to be done.  A FIXME can be
> added at import time to already existing osm.org elements to warn
> about the ongoing import.
> 
> Cheers,
> 
> André.
> 
> 
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