On Monday 02 January 2017, Christian Quest wrote:
> I'm pleased to announce a new version for the "french style" tiles...
> running on a brand new server donated by OVH.com
Very nice.
>
> Main new things compared to the international style:
> - tidal=* rendering
I am somewhat confused about the tagging scheme you render here - is
that documented somewhere? Your water areas query:
(SELECT ST_Snaptogrid(way,!pixel_width!/4) as way,
\"natural\",waterway,landuse,amenity,
coalesce(tags->'name:fr',tags->'int_name',name) as name,
tags->'basin' as basin, water, surface
FROM planet_osm_polygon
WHERE (
waterway in ('dock','mill_pond','riverbank','canal') or
landuse in ('reservoir','water','basin','salt_pond') or
\"natural\" in ('lake','water','land','glacier','mud','bayx') or
amenity='fountain' or water='tidal')
and building is null and way_area > !pixel_width!*!pixel_height!*10
and way && !bbox! ORDER BY z_order,way_area desc) as water_areas
indicates you render any water area as well as any area tagged
water=tidal no matter what the primary tag is that has surface=rocky
with the rock pattern overlay. IMO this is not such a good idea
because it does not really encourage correct tagging - mappers can use
invalid primary tags (like natural=foo + water=tidal + surface=rocky)
or use nonsense combinations (like natural=mud + surface=rocky) without
the map indicating the mistake. Also the most common tag for
indicating tidal features is tidal=yes and not water=tidal.
You do not seem to render natural=shoal and wetland=tidalflat which are
the dominant ways of mapping tidal areas at the moment (though
admittingly wetland=tidalflat does not really make much sense for rocky
tidal areas which are usually not flat).
--
Christoph Hormann
http://www.imagico.de/
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