Ticket #1607 (new enhancement)

Opened 5 years ago

Last modified 6 days ago

[landcover] rendering natural=wetland, wetland=* differently

Reported by: Ulf Mehlig Owned by: mapnik-team@…
Priority: minor Milestone: Wishlist
Component: mapnik Version:
Keywords: rendering Cc: fluteflute

Description

The tag natural=wetland can be used with additional wetland=wetland_type tags (wetland=bog, wetland=mangrove, ...). I produced a set of bitmaps for seamless rendering that possibly could be used for wetland rendering and uploaded them to wiki.openstreetmap.org

 http://wiki.openstreetmap.org/wiki/Image:Wetland_marsh.png

 http://wiki.openstreetmap.org/wiki/Image:Wetland_bog.png

 http://wiki.openstreetmap.org/wiki/Image:Wetland_reedbed.png

 http://wiki.openstreetmap.org/wiki/Image:Wetland_swamp.png

 http://wiki.openstreetmap.org/wiki/Image:Wetland_tidalflat.png

 http://wiki.openstreetmap.org/wiki/Image:Wetland_saltmarsh.png

 http://wiki.openstreetmap.org/wiki/Image:Wetland_mangrove.png

So far, apparently wetland=bog (and the old natural=marsh) are rendered. If you find my bitmaps suitable, I would be happy if you could implement the rendering of the respective wetland types.

Thanks for your attention! All the best, Ulf

Change History

comment:1 Changed 5 years ago by Ulf Mehlig

  • Owner changed from tom@… to steve8@…
  • Component changed from admin to mapnik
  • Milestone set to Wishlist

comment:2 Changed 5 years ago by Ulf Mehlig

The area in

 http://www.informationfreeway.org/?lat=-0.9122481245819861&lon=-46.67465208067483&zoom=15&layers=00000F0B0F

may serve as a test case; areas tagged with wetland=mangrove and wetland=marsh are currently invisible. An area where I did not change the older tagging (natural=marsh) _is_ rendered.

Ulf

comment:3 Changed 5 years ago by Ldp

landuse=wetland rendering has been in since June. Renders the same as natural=marsh.

comment:4 Changed 4 years ago by Ldp

  • Owner changed from steve8@… to mapnik-team@…

comment:5 Changed 4 years ago by EdLoach

For natural=wetland, wetland=tidalflat which the wiki describes as "Tidally inundated areas of bare mud, sand or similar sediments", I'd prefer a solid colour looking something like wet sandy mud if possible, please. I've been using the OS Opendata to try marking the Mean High Water as coastline and the Mean Low Water as an outer way of a natural=wetland, wetland=tidalflat multipolygon and it needs something a little more solid to make the Mean Low Water level clearer - the marsh symbol currently rendering for natural=wetland is just a bit vague.  http://osm.org/go/0EH4HacT-- is an example, but as I write still shows old coastlines. Thanks.

comment:6 Changed 4 years ago by fluteflute

  • Cc fluteflute added
  • Summary changed from render suggestion for natural=wetland: bitmaps on wiki.openstreetmap.org to rendering natural=wetland, wetland=* differently

I agree with EdLoach that it is important that natural=wetland is not all rendered the same.

It is incredibly frustrating trying to get local mappers to use natural=wetland along with for example wetland=tidalflat when all natural=wetland renders just as marsh (wetland=marsh). There are over 450 uses of wetland=tidalflat in OSM for example, often covering large areas - these areas deserve better rendering.

comment:7 Changed 4 years ago by fluteflute

Duplicate closed at #2539

comment:8 Changed 4 years ago by malcolm.herring@…

I agree with the sentiment of this ticket. I would however, suggest that the renderings be given a non-transparent background. It would help to delineate the area and a suitable choice of colour would add more meaning to the rendering. e.g. the existing rendering for "natural=mud" would work just fine for the "wetland=tidalflat" tag.

comment:9 Changed 2 years ago by Ulf Mehlig

Below two emails by Lennard and Steve, explaining mapnik-team's next step. Steve has contacted Twain asking whether he could design some appropriate wetland fills.


On Sat, 2011-12-10 at 15:19 +0000, Steve Chilton wrote:

I did ask Twain to devise some wetland fills for consideration, and am happy to go back to him and chase this along.

Steve From: Lennard [ldp@…] Sent: Saturday, December 10, 2011 1:57 PM To: ulf.mehlig@… Cc: mapnik-team@… Subject: Re: trac ticket #1607

On 10-12-2011 11:31, Ulf Mehlig wrote:

 http://trac.openstreetmap.org/ticket/1607

has been in the pipeline for a very long time. What can we do to get this resolved?

Thanks for considering ...

I've asked steve8 if he could look into that one, a while ago. The problem was twofold: wetland=* needed to be imported as a tag (this part is done IIRC), and the supplied example bitmaps were not entirely to taste.

Steve, do you remember how far along you got with this?

-- Lennard

comment:10 Changed 6 days ago by math1985

  • Summary changed from rendering natural=wetland, wetland=* differently to [landcover] rendering natural=wetland, wetland=* differently
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