[mkgmap-dev] How can I force the inners of a boundary relation to display?

Sat Dec 8 14:10:26 GMT 2018

That does work but it makes all ways that are named boundary relations (
with mkgmap:boundary_name =*) render with the same style. I can live with
that but I'm still wondering if there is a way to force it to only operate
on inners and only on ways of type boundary=protected_area ? Can I set in
"relations" and test in "lines" for a new mkgmap:boundary_name, for
example, boundary1_name?

Another interesting problem I just noticed is that simple islands (not
multipolygons) whose coastlines are also boundaries do not display as
islands, only as members of the refuge they are a part of. The coastlines
fail to display whether or not the above code is active or commented out so
it must be a separate issue. Take a look at Village Islands inside the
Kodiak National Wildlife Refuge. These display as  continuous boundaries
with my style [0x10e12], but there is no "land" inside the boundaries, only
sea. So, these objects are tagged as place=islet, natural=coastline, but
they are also outers in the Kodiak National Wildlife Refuge.

Dave

On Sat, Dec 8, 2018 at 6:13 PM Gerd Petermann <
gpetermann_muenchen at hotmail.com> wrote:

> Hi Dave,
>
> there is code in mkgmap to treat multipolygon relations. See
> mkgmap:mp_created and mkgmap:stylefilter in
> http://www.mkgmap.org.uk/doc/pdf/style-manual.pdf
> The multipolygon code produces those extra ways only for the outer rings.
> If you just want to render the outlines you may use something like
> mkgmap:boundary_name=* 0x10e12 resolution 19 continue]
> at the top of the lines file.
>
> Gerd
>
> ________________________________________
> Von: Dave Swarthout <daveswarthout at gmail.com>
> Gesendet: Samstag, 8. Dezember 2018 11:30
> An: Gerd Petermann
> Cc: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] How can I force the inners of a boundary
> relation to display?
>
> Yes, that's confusing to me. I included those snippets to illustrate what
> I am currently using — maybe you can explain to me stepwise how those
> boundaries get rendered?
>
> Is there code inside mkgmap that interprets such directives and applies
> tags to the outer ways of relations? If there is then I assume the same can
> be done for those inners. And you would be the one who can best answer that
> question.
>
> Thanks for taking the time to explain.
>
> Dave
>
> On Sat, Dec 8, 2018 at 5:03 PM Gerd Petermann <
> gpetermann_muenchen at hotmail.com<mailto:gpetermann_muenchen at hotmail.com>>
> wrote:
> Hi Dave,
>
> in the relations rule you set mkgmap:boundary_name but in the lines rule
> you don't use that.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk<mailto:
> mkgmap-dev-bounces at lists.mkgmap.org.uk>> im Auftrag von Dave Swarthout <
> daveswarthout at gmail.com<mailto:daveswarthout at gmail.com>>
> Gesendet: Samstag, 8. Dezember 2018 03:18
> An: Development list for mkgmap
> Betreff: [mkgmap-dev] How can I force the inners of a boundary relation
> to      display?
>
> Hi,
>
> I've been adding large Alaskan National Wildlife Refuges to OSM. The
> boundaries weren't displaying so I added a directive in my relations file
> modeled after the administrative boundary code in the default style that
> adds a name to protected areas like so:
>
> (type=boundary | type=multipolygon) & boundary=protected_area & name=*
> { apply
>   {
>     set mkgmap:boundary_name='$(mkgmap:boundary_name)/${name}' | '${name}';
>   }
> }
>
> Then in my lines file I included a line style defined as:
> boundary=nature_reserve | boundary=protected_area [0x10e12 resolution 19].
>
> This works well but the lines bounding the inner areas of these relations
> do not render. How can I make them display?
>
> Many thanks
>
> Dave
>
> --
> Dave Swarthout
> Homer, Alaska
> Chiang Mai, Thailand
> Travel Blog at http://dswarthout.blogspot.com
>
>
> --
> Dave Swarthout
> Homer, Alaska
> Chiang Mai, Thailand
> Travel Blog at http://dswarthout.blogspot.com
>

-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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