[OSM-dev] Questions on modifying openstreetmap-carto

[Mateusz Konieczny]

"reading from relation" part is quite hard.
I have no idea how to do that.


Aug 26, 2020, 09:50 by mapper+dev at minoa.li:

> Hello again,
>
> I am starting to get the basics of adding new fields to project.mml, but I now wish to update “amenity-points” so that bus stops use the network name from the “stop_area”, like they do in France. At the moment I can manage:
>
>  tags->'network' AS network,
>
> … which calls up the network tag from the node only. How do I make it to read from the “stop_area” relation too?
>
> Apologies for being very specific: I am very new to anything beyond simple recolours.
>
> — ika-chan!
>
>> On 25 Aug 2020, at 21:44, Andy Townsend <ajt1047 at gmail.com> wrote:
>>
>> On 25/08/2020 19:52, Mateusz Konieczny via dev wrote:
>>
>>> Yes, I always used normal text editor.
>>>
>> Same here.  There are projects such as https://wiki.openstreetmap.org/wiki/TileMill which were / are designed to automate map reloading after changes, but when I last used TileMill (a long time ago) there were signnificant problems using TileMill with an OSM Carto-derived style (not least - there are so many tabs that they disappeared off the screen).  I tend to just reload when I want to rerender.  When changing my own OSM Carto-derived map style I use https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/update_render.sh and https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/update_carto.sh to reload data (the first if a lua script has changed and the database needs to be reloaded; the second if only a style file has changed and the style just needs to be recompiled).
>>
>>
>>> If you want to see how changes are done
>>> I would recommend looking at pull requests
>>> and commit history.
>>>
>> I tried to summarise "Adding a change to OSM Carto" at https://www.openstreetmap.org/user/SomeoneElse/diary/43041 ; some of that won't be relevant but some of it might still be - things like testing the effect of a colour change.
>>
>> If you haven't seen it already, please do read https://ircama.github.io/osm-carto-tutorials/git-workflow/ and the related tutorials there - they're excellent!
>>
>> Best Regards,
>>
>> Andy
>>
>>
>>
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>>
>
>
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