[mkgmap-dev] using mkgmap:admin_level2 in polygons

Fri Feb 19 21:06:01 GMT 2021

Hi Gerd,

I tried to set a value in relations, but it applies to the ways defining the polygon and not the polygon itself (so not visible in polygons file)
I also found that mkgmap:admin_level2 is null in relations so it wouldn't work anyway.

I found a "workaround" that works for Croatia because the "ISO3166-2" tag is set for counties in OSM :)

boundary=administrative & admin_level=6 & name=* & ISO3166-2 ~ 'HR-.*'
    { set mkgmap:label:1='${name}' } [0x16 resolution 14]

Ranko

On 19.02.2021. 21:10, Gerd Petermann wrote:
> Hi Ranko,
>
> 1) type=boundary relations are not kept complete by splitter unless you set corresponding options. Incomplete relations have rather unpredictable shapes.
> 2) the tag mkgmap:admin_level2 is set by the LocationHook. This calculates the center of the polygon and looks up the tags for that point. If the center is not inside the polygon this will fail.
>
> There is a rule in relations which adds tag mkgmap:boundary_name. No idea if this can be used in polygons, it is used in lines to render the borders.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ranko Jaksic <rjaksic at zgi.hr>
> Gesendet: Freitag, 19. Februar 2021 20:52
> An: mkgmap-dev
> Betreff: [mkgmap-dev] using mkgmap:admin_level2 in polygons
>
> Hi,
>
> I wanted to "display" counties using invisible polygons (so names are displayed when hovering in BC or GPSr).
> It is a multi-country map and county definitions differ from country to country so I tried using mkgmap:country (mkgmap:admin_level2).
>
> In the style manual mkgmap:admin_level2 is defined as "Name of the boundary=administrative relation/polygon with admin_level=2 the element is located in"
> However, when I used the following rule in my style polygons file some counties were skipped:
>
> mkgmap:admin_level2=HRV & boundary=administrative & admin_level=6 & name=* [0x16 resolution 14]
>
> Using echotags I found that mkgmap:admin_level2 was set.
> However, some of the counties had it set to neighbouring country codes (SVN, BIH, SRB) and didn't pass.
>
> Example county:
> https://www.openstreetmap.org/relation/226749
>
> Actually, splitter splits the map into more then one tile, so the county gets split too.
> In some of the tiles mkgmap:admin_level2 gets set to HRV (as expected), but in others it is set to BIH
>
> I used the latest bounds file (20210212) and a custom OSM-map area, but the same happened when testing with croatia-latest.osm.pbf
>
> What am I missing?
>
> regards,
> Ranko
>
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