[mkgmap-dev] How to display administrative boundaries / shade them?

Thu Jan 20 04:34:34 GMT 2022

Oh perfect -- thanks for your help. I'm displaying arbitrary polygons, so I
can control the output entirely. Changing the order so that it's node, way,
relation seems to work.

Craig

On Wed, Jan 19, 2022 at 2:20 AM Gerd Petermann <
gpetermann_muenchen at hotmail.com> wrote:

> Hi all,
>
> see file in https://files.mkgmap.org.uk/detail/545
>
> I think the file is a valid OSM file. JOSM doesn't open it because the
> meta data is missing, but that can be fixed with osmconvert:
> osmconvert conyers.osm --fake-version -o=conyers-fake.osm
>
> However, this doesn't help for mkgmap.
> The current implementation of the osm data readers (*.osm *.o5m or *.pbf)
> in mkgmap cannot handle files where relations appear
> before the way or node members of the relation. The effect is that the
> relation is ignored.
> I've uploaded a modified version which shows the expected order:
> https://files.mkgmap.org.uk/detail/546
>
> I don't know how much work it would be to support this rather special file
> format. We already have code to handle relations which refer to relations
> that
> were not yet read, I guess it would require similar code for node members
> and way members.
>
> Let me know if you think this should be done or even better: post a patch
> ;)
>
> @Craig:
> I don't know what exactly you want to do. Normally mkgmap processes
> rectangular tiles containing all the OSM data for that area.
> Such a tile would contain various boundary=administrative relations or
> ways. Of course it makes no sense to render 0x07 polygons
> for all those boundary=administrative objects. You would end up with a
> huge amount of overlapping 0x07 polygons covering
> all of your map.
>
> Gerd
>
>
>
>
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von
> Gerd Petermann <gpetermann_muenchen at hotmail.com>
> Gesendet: Dienstag, 18. Januar 2022 22:04
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] How to display administrative boundaries /
> shade   them?
>
> Hi Craig,
>
> try this overpass query
> (
> rel(id: 119584);
> >>;
> );
> out;
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von
> Craig Durkin <craigdurkin at gmail.com>
> Gesendet: Dienstag, 18. Januar 2022 21:39
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] How to display administrative boundaries /
> shade      them?
>
> Oh interesting, I wonder what the size difference is. I just uploaded my
> version of the relation to https://files.mkgmap.org.uk/detail/545 -- it's
> 159.499 bytes, but it looks complete to me: it has the relation tags with
> member way references, the constituent nodes (with latitude/longitude), the
> ways themselves with node references, and tags for everything.
>
> I created it by running the following query on Overpass Turbo (
> https://overpass-turbo.eu ):
> rel(id: 119584);
> out body;
> >;
> out skel qt;
>
> Thanks!
> Craig
>
> From Gerd Petermann gpetermann_muenchen at hotmail.com <mailto:
> mkgmap-dev%40lists.mkgmap.org.uk
> ?Subject=Re:%20Re%3A%20%5Bmkgmap-dev%5D%20How%20to%20display%20administrative%20boundaries%20/%0A%09shade%09them%3F&In-Reply-To=%3CAM0PR08MB54102C8A6DFD61494B89BF0E9E589%
> 40AM0PR08MB5410.eurprd08.prod.outlook.com%3E> on Tue Jan 18 20:05:16 GMT
> 2022
>
> Hi Craig,
>
> it works for me when data.osm contains the complete relation. I just
> downloaded just that relation with all its members in JOSM
> and the file has 359.898 bytes.
> What's the content of your data.osm?
> Maybe upload it to https://files.mkgmap.org.uk/
>
> Gerd
>  -
>
> On Tue, Jan 18, 2022 at 2:30 PM Craig Durkin <craigdurkin at gmail.com
> <mailto:craigdurkin at gmail.com>> wrote:
> That's what I would have thought too, but no luck. It seems like the
> "polygons" file maybe only deals with closed ways and not specifically
> relations?
>
> For what it's worth, my program is invoked with:
>
> java -jar mkgmap-r4586/mkgmap.jar --gmapsupp --gmapi --transparent
> --output-dir=gmap_output --style-file=mkgmap-r4586/new_style/ data.osm
>
> and the 'polygons' file in new_style/polygons has the following line in it:
> boundary=administrative [0x07 resolution 20]
>
> Craig
>
> From Gerd Petermann gpetermann_muenchen at hotmail.com <mailto:
> mkgmap-dev%40lists.mkgmap.org.uk
> ?Subject=Re:%20Re%3A%20%5Bmkgmap-dev%5D%20How%20to%20display%20administrative%20boundaries%20/%20shade%0A%20them%3F&In-Reply-To=%3CAM0PR08MB541016A276CDB396533304559E589%
> 40AM0PR08MB5410.eurprd08.prod.outlook.com%3E> on Tue Jan 18 18:41:33 GMT
> 2022
>
> Hi Craig,
>
> I think all you need is a rule in style file polygons to render the object.
>
> Gerd
>
> On Tue, Jan 18, 2022 at 1:33 PM Craig Durkin <craigdurkin at gmail.com
> <mailto:craigdurkin at gmail.com>> wrote:
> Hi mkgmap folks -- sorry if this is kind of a beginning question, but I
> can't for the life of me figure out how to get administrative boundaries
> (or really any arbitrary polygon) to display with mkgmap. Ideally I'd be
> able to lightly shade the inside of the boundary polygon, but even
> displaying the polygon is eluding me.
>
> An example OSM relation that I'm trying to display is Conyers, GA, USA
> relation ID 119584.
>
> I understand that there might be editing necessary to the style files, but
> it's not really clear: do I edit relations, lines, or polygons? Or all 3?
>
> Can anyone offer any tips?
>
> Thanks,
> Craig
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