I am reminded of at least one single way I have edited (there could be
more, it was some time ago)... it is a single way used for;
boundary of 2 states of Australia
boundary of 2 councils
boundary of 2 National Parks - note that these 'National Parks' are
administered by the individual states and have different rules...
All of these are separate relations... with quite a few shared ways.
Messy, but done.
The rendering looks good to me.
While you may have 2 nature reserves adjacent they both need to be on
the map, so they can be individually found. So they should not be
combined in the data base.
Rendering of boundaries of the same type .. but with less prominence?
Would not be high on my priority list... but doable. The render could
should them with the same prominence as one single boundary.
Councils and countries usually share boundaries so they would have some
thought to combining there boundary rendering.
There must be similar things between England/Scotland/Wales...
On 06/06/19 18:12, Mateusz Konieczny wrote:
5 Jun 2019, 19:55 by mar...@templot.com:
But on the OSM standard map, the common boundary is shown as a
bold green line, which bears no relation to anything on the ground
and could be misleading for visitors.
Note that maps are not aerial images - there is often significant
level of abstraction and
especially for borders there is often nothing visible on the ground.
This rendering was used as compromise between several different problem.
Note also that the same styling applies to all nature reserves across
the world.
Is there a better way to map this?
There are two nature reserves there, right?
If I combine them as a single nature reserve
sounds like tagging for the renderer -
https://wiki.openstreetmap.org/wiki/Tagging_for_the_renderer
Is there a way to show the common boundary less prominently?
This is on side of renderers. This one has repository at
https://github.com/gravitystorm/openstreetmap-carto/
where proposals to improve it or pull requests with code improving it
may be submitted.
Though again, the same rendering rules are applied globally, and for
every single one
there are cases where it fails horribly. Improving one specific place
may have really bad
results elsewhere.
On the data side - I would consider tagging borders on the shared way
(mapping boundaries
as multipolygons), currently each nature reserve is a separate way.
https://www.openstreetmap.org/way/694760748#map=17/52.37217/-2.28169
(it would not change rendering, at least on default OSM map)
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