[mkgmap-dev] problem with highways as multipolygons

Sat May 9 08:39:17 BST 2015

Hi Andrzej,

I agree that it looks strange, 
but it works when you use apply like this:
type=multipolygon & highway=* { apply { set area=yes; } }

The reason is rather simple:
The method MultiPolygonRelation.processElements() which creates 
the polylines is called before 
style evaluation, so your version adds the tag to the relation
but that tag is only evaluated within the style rules.

You may also ask for mkgmap:mp_created=true in the rules.

I can't reproduce that the lines rules are applied, 
with my test file that contains the complete relation 
only the polygon rules are used. I assume your input
file contains only a part of the relation?

Gerd

> Date: Fri, 8 May 2015 22:13:20 +0200
> From: popej at poczta.onet.pl
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: [mkgmap-dev] problem with highways as multipolygons
> 
> Hi All,
> 
> I have stuck at following problem:
> 
> There is relation 4764899:
> 
> type=multipolygon
> highway=footway
>      Line 336969927 as inner
>      Line 336969921 as outer
> 
> This is an area, probably it should include tag "area=yes", but actually 
> it doesn't. Mkgmap creates a new polyline from multipolygon and polyline 
> is processed according to rules in "lines" part of style.
> 
> I haven't found any method to safely remove this line from my map. I 
> have tried to added following rule to "relations" file:
> 
> type=multipolygon & highway=*
> {
>    set area=yes;
> }
> 
> but this doesn't work, new tags aren't added to created polyline. This 
> looks for me like a bug.
> 
> Any ideas, how to deal with multipolygon?
> 
> -- 
> Best regards,
> Andrzej
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> mkgmap-dev at lists.mkgmap.org.uk
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