[OSM-talk] source=Google

[malenki]

Yohan Boniface wrote:

>On 05/18/2013 03:55 PM, malenki wrote:
>> Dave F. wrote:
>>> IMO Source should be on the object, not on the changeset.
>>
>> +1 (except if there is one changeset for one object (; )
>
>This is not my opinion. Let's take a simple example: a school.
>
>Some first user maps it from imagery, and so just draws the building.
>So we have something like:
>building=yes
>source=Bing

there is source:outline=* 
http://taginfo.osm.org/keys/source%3Aoutline
(used 10150 times so far)

>Now someone who went on the place add the fact that this building is a 
>school. So we have something like:
>building=yes
>amenity=school
>name=Ecole de la Vie
>source=Bing;survey

source=survey - since it has been surveyed

>Now, the public administration release an open data file with many 
>informations on every schools. Someone takes this info and add it to
>our school. So we have now, for example:
>building=yes
>amenity=school
>name=Ecole de la vie
>capacity=1800
>wheelchair=yes
>addr:street=Rue de la Vie
>addr:housenumber=42
>source=?

there is source:addr=
http://taginfo.osm.org/keys/source%3Aaddr
(used 2015605 times so far)

>Now, we have the opportunity to fly a drone on the area, and so we
>have a very accurate imagery, which is great. So someone goes on our
>building way and move it a little bit, change a little bit the shape
>to better follow the reality, etc.

change source:outline

>So the question is: now, what should be the source tag value? And
>which of every attributes or geo informations is covered by this value?
>
>My personal answer is that the source should be on the changeset,
>which is where the data comes from.

Mine you see above.