I do like the idea of one key to rule them all. But I am uncomfortable with a key name which has a negative preface.
At first I wondered about a perennial tag but then the values might be difficult. Then it occurred that we are trying to tag the presence of something, in this case water. There are only a few things tagged with presence=* now [1] and they look unrelated to water. But how about: presence=perennial/seasonal/intermittent/ephemeral/summer/spring/winter/autumn/ etc. And state that perennial be the default if untagged. Cheers! [1] https://taginfo.openstreetmap.org/keys/presence#values > On Dec 13, 2018, at 4:55 PM, Warin <61sundow...@gmail.com> wrote: > > Thoughts ... (take on Hobbit like theme - one key to rule them all...) > > As both intermittent and seasonal are all render the same .. why not combine > them into one key as well? > > > non_perennial=seasonal/intermittent/ephemeral/summer/spring/winter/autumn/intermittent_summer/ephemeral_summer > etc > > I note that intermittent is taken by many as 'I know it is non-perennial' so > it may be appropriate to have a non_perennial=yes for the more common mapping > value. > > ??? > Well? Is that a reasonable idea? > > It could be implemented as a mechanical edit on > seasonal 1:1. > On intermittent=yes ... as non_perennial=yes with a request to determine a > more specific value? > On intermittent=season ... as non_perennial=intermittent_season > > These could coexist with the present tags while people changed over. > > > On 14/12/18 10:58, Sergio Manzi wrote: >> You can do exactly the same with my new proposed values for intermittent=* >> >> No need for a new key, I think. >> >> Cheers, >> >> Sergio >> >> >> On 2018-12-14 00:48, Warin wrote: >>> On 13/12/18 12:48, Sergio Manzi wrote: >>>> >>>> On 2018-12-13 02:36, Warin wrote: >>>>> At the moment developing a system to render seasonal values on requires a >>>>> determination on spring/summer/autumn/winter etc .. this would add some >>>>> new terms. Not too hard but does add to things. >>>> Also developing a system to render the ephemeral key would add some >>>> complexity, probably more... >>>> >>>>> Not certain about ephemeral being subservient to intermittent. >>>> If it is not there all of the time, than it is intermittent. >>>> If it doesn't last long, than it is ephemeral (but then it is not there >>>> all of the time and thus it is intermittent too). >>>> >>> >>> The primary motivation for me is that a water feature with intermittent is >>> more likely to have water, even it I have to dig a meter or two for it, >>> than a water feature with ephemeral. >>> >>> I don't expect a 'normal' map will tell me this. But a desert map should. >>> >>> I would map the ephemeral river banks/courses. >>> But then the places where water pools to form more permanent water sources >>> I would as natural=water, intermittent=yes. In this way they can be >>> distinguished as a more probable source of water. >>> Some satellite imagery shows these .. but then some shows the area just >>> after rain! So it requires some judgements. >>> >>> I'll add this as a rationale ... >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Tagging mailing list >>> Tagging@openstreetmap.org <mailto:Tagging@openstreetmap.org> >>> https://lists.openstreetmap.org/listinfo/tagging >>> <https://lists.openstreetmap.org/listinfo/tagging> >> >> >> _______________________________________________ >> Tagging mailing list >> Tagging@openstreetmap.org <mailto:Tagging@openstreetmap.org> >> https://lists.openstreetmap.org/listinfo/tagging >> <https://lists.openstreetmap.org/listinfo/tagging> > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging
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