> "defaults" are something for that data consumers need when actual data is > missing. ;-)
YMMV... My current point of view is different: + "defaults" are something to make tagging easier and more efficient. + They allow redundant data to be missing and thus make the database cleaner and smaller. + If the default value must be changed (e.g. the regulations are changing) the bulk of the modifications is smaller. Also please imagine a new local mapper willing to add data. If it is easy to improve a bit the map with one straightforward tag (e.g. highway=living_street) then documentation, translations, answers and mapping are easier for everyone. If it needs a full chain of tags: highway=residential + motorcar=private + emergency=yes + psv=yes + disabled=yes + ... and full understanding of the access key, access wikipage, in English only; acronyms, caveats like access=yes and access=no... That is another story altogether. One single error in the tagging can screw it all. Maps are done also by local people for local people. Not only by very experienced OSMers, skilled with computers and fluent in English for fellow taggers. > IMHO this should not be used to remove tags that are > defined as "default". Not proposed, not mentioned, not in my mind. > In a system like OSM you always have the problem that > the absence of a tag can mean 2 things: incomplete data/mapping or default > data. Until you add the tag you won't know. That is right. And this is something I can live with. If I wanted to address this issue as simply as possible: e.g. highway=* + [maxspeed not set] is mapped correctly and the default maxspeed is adequate. But I want to indicate that maxspeed is known for real and it is not incomplete data: -> highway=* + maxspeed=default Of course some people are not favorable to defaults or they have different limits on what is acceptable. So any discussion on the subject is a hard one. If there is no consensus on "using defaults: yes or no", it becomes difficult to discuss how to choose default values, how to tag values identical to default, and so on... > Please search the archive, this was discussed several times in depth. Nice proposition. Searching="default" is always a good start but... would anyone care to point other keywords that could lead to interesting discussions? Also is there some meaningful wikipage and proposals [draft/rejected/accepted...] specifically on the subject of defaults? other than: http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Maxspeed#Default_speed_limits http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Access-Restrictions#Default http://wiki.openstreetmap.org/wiki/Proposed_features/access_restrictions_1.5#Default_access_restriction_values http://wiki.openstreetmap.org/wiki/Relations/Proposed/Defaults _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
