Talk:Proposed features/Tag:natural=rocks

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AS my comment to marine mapping says, a rock that is submerged all the time should be tagged with depth=*, a rock that sticks up from the water all the time should be tagged ele=heigth and a rock that is submerged only on high tide should be tagged with tidal=yes --Skippern 17:46, 31 May 2009 (UTC)

Right, but i dont think it makes sense to tag rocks as "tag|depth". Are you ok with the feature "natural=rocks" or would "seamark=caution" make more sence? The point of the tag is to tell sailors that there are rocks, and to use caution. --acrosscanadatrails 07:44, 1 June 2009 (UTC)
As an active user of marine charts, I feel that seamark=caution more applies if there is need for a caution note. We need a speciffic tag for skerries and rocks, wether they are fully submerged all the time or not. Reefs can also be considered a dangerous area with a caution note, but should definitely be tagged differently. Doesn't hurt to mark a caution as well. For submerged rocks, the waterdepth is of importance to what boats can pass close safely and who need a better clearance to pass. --Skippern 10:42, 1 June 2009 (UTC)


I've added, and updated the canvec sample area of Ucluelet, BC with this tag so it should show up better. And obvious that it is an island (even small) I haven't added seamark=caution. For shallow areas, which are shaded polygons, they get rendered differently than open water, to the fact that it looks different "should" be good enough. Once the tag "seamark=caution" becomes it's own wiki page, and others agree. It might be worth adding. (personally, i would like to see 'seamark' listed in JOSM presets.) Or at least having more options to choose from in the water/waterway section.

--acrosscanadatrails 01:53, 2 June 2009 (UTC)

Both Mapnik and Tilesathome know place=islet for smaller islands. There's no written guide as to where the line is, but the place=island islands are shown quite prominently and already at zoom=10 and zoom=12, while islets only from z=14 and z=13. Alv 06:16, 2 June 2009 (UTC)