[Talk-ca] Grand Lacs / Great Lakes

[Adam Martin]

Hello Sebastien,

I remember seeing a discussion of this issue - not on the talk.ca mailing
list, but on the subreddit for Openstreetmap (
https://www.reddit.com/r/openstreetmap/comments/3z7w9d/where_are_the_great_lakes/).
In it, the OP notes that the Great Lakes have disappeared off the map at
higher zoom levels. The reason was traced to the acts of one user whom
seemingly decided to unilaterally changed all the tags on the Lakes from
Coastline to Natural=Water, thus killing the rendering of the Lakes at
those zoom levels. But this rendering is only a problem for the default
renderer - many others will display it correctly.

Haven't heard of a consensus on the matter. Technically, the coastline tag
is incorrect as these are Lakes, not Oceans / Seas. So this change is
technically for the better as it is more accurate. But the rendering has
been coastline for sometime.

Adam

2016-01-24 14:38 GMT-03:30 Sebastien Duthil <duthils at free.fr>:

> English version follows.
>
> Bonjour à tous,
>
> j'ai remarqué que, sur le zoom 5 du rendu standard OSM [1], seul le lac
> Huron apparaît. S'en suivent plusieurs questions:
>
> - Est-ce normal?
> - Le wiki OSM [2][3] fait état que les Grands Lacs font partie des rares
> lacs qui soient taggés natural=coastline et de ce fait, ils devaient
> toujours être visibles.
> - En regardant de plus près les relations de ces lacs, je n'ai pas vu le
> tag natural=coastline. J'ai trouvé les changesets suivants, qui
> suppriment le tag natural=coastline:
>
>   - Lac Supérieur: 15 janvier 2016 [4]
>   - Lac Michigan: 15 janvier 2016 [5]
>   - Lac Huron: 08 janvier 2016 [6]
>   - Lac Ontario: 02 mars 2015 [7]
>   - Lac Erie: 25 décembre 2015 [8]
>
> - La dernière discussion que j'aie vu sur talk-us/talk-ca à ce propos
> date du 26 avril 2015 [9], où le tag natural=coastline a été conservé,
> sauf pour le lac Ontario, qui ne l'avait déjà plus. Avez-vous
> connaissance d'une autre discussion plus récente à ce sujet sur d'autres
> listes qui pourrait justifier cette modification?
> - Devrions-nous remettre le tag natural=coastline? Mon avis est que oui,
> s'il n'y a pas eu discussion antérieure. Sa disparition doit être
> discutée en amont.
> - Étant donné que plus aucun Grand Lac n'a natural=coastline, pourquoi
> seul le lac Huron est-il visible?
>
> ------------------------------------------------------------------
>
> Hello everyone,
>
> I see that the standard rendering of OSM on zoom 5 [1] only shows Lake
> Huron, but not the other Great Lakes. Here are my questions:
>
> - Is this normal?
> - The OSM wiki [2] [3] says that the Great Lake are the few exceptions
> of lakes being tagged as natural=coastline, which should make them
> visible at any zoom level.
> - By looking at the different lakes' relations, I did not see any
> natural=coastline tag. Here are the changesets removing natural=coastline:
>
>   - Lake Superior: January 15th 2016 [4]
>   - Lake Michigan: January 15th 2016 [5]
>   - Lake Huron: January 8th 2016 [6]
>   - Lake Ontario: March 2nd 2015 [7]
>   - Lake Erie: December 25th 2015 [8]
>
> - The latest discussion I've seen on this topic on talk-us/talk-ca was
> on April 26th 2015 [9], where the decision was to restore
> natural=coastline instead of natural=water (except on Lake Ontario,
> which already had natural=water). Do you know of any more recent
> discussion about this on other lists, that would support this change?
> - Should we restore natural=coastline on the Great Lakes? My opinion is
> yes, if there were no prior discussions. Then if someone wants to change
> it, he should discuss it first.
> - Since no Great Lake has natural=coastline anymore, why is Lake Huron
> the only one to show on the standard rendering?
>
> ------------------------------------------------------------------
>
> [1] http://www.openstreetmap.org/#map=5/43.866/-85.034
> [2] https://wiki.openstreetmap.org/wiki/Great_Lakes
> [3]
>
> https://wiki.openstreetmap.org/wiki/Tag:natural%3Dcoastline#What_about_lakes.3F
> [4] http://www.openstreetmap.org/changeset/36589478
> [5] http://www.openstreetmap.org/changeset/36589361
> [6] https://www.openstreetmap.org/changeset/36454539
> [7] https://www.openstreetmap.org/changeset/29200524
> [8] https://www.openstreetmap.org/changeset/36168843
> [9]
> https://lists.openstreetmap.org/pipermail/talk-us/2015-April/014812.html
>
> --
> Sébastien Duthil
>
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> Talk-ca at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-ca
>
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