Openmaptiles: Feature Request: add abbreviation fields for country/state points

[otherjason]

When zoomed out on a map, it can be useful to utilize abbreviations for country/state labels when appropriate, especially for those with small area. The Natural Earth dataset contains an abbrev field that is useful for this purpose. Is it feasible to merge this in with the place nodes that have class country or state?

[jirik]

@otherjason Thanks for suggestion. Yes, it is feasible. Dou you want to look at it? It means to create new abbrev attribute in place layer and to fill it with NE data for lower zoom levels. It should be quite straightforward.

[otherjason]

I'm willing to give it a look if you can provide some pointers to where
that might be done. All I see in the repository are layer mapping
definitions for the schema; I'm assuming that the merging of Natural Earth
data is done elsewhere.

On Fri, Jul 14, 2017 at 9:11 AM, Jiri Kozel [e-mail]
wrote:

@otherjason https://github.com/otherjason Thanks for suggestion. Yes,
it is feasible. Dou you want to look at it? It means to create new abbrev
attribute in place layer and to fill it with NE data for lower zoom
levels. It should be quite straightforward.

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[jirik]

@otherjason Sorry for confusion, country names are completely taken from OSM now, so it is better to take the new attribute from OSM data.

Some hints:
https://www.openstreetmap.org/node/424310601

• you are probably interested in ISO3166-1 or country_code_iso3166_1_alpha_2 tag (whichever gets you better result)

https://github.com/openmaptiles/openmaptiles/blob/master/layers/place/mapping.yaml

• add mapping for the tag (e.g. ISO3166-1)

https://github.com/openmaptiles/openmaptiles/blob/master/layers/place/layer.sql

• add new attribute abbrev
• use value of the OSM tag for abbrev attribute in case of countries
• set null values for abbrev attribute for other places

https://github.com/openmaptiles/openmaptiles/blob/master/layers/place/place.yaml

• add abbrev to query
• add description of abbrev

Finally you need to do some testing. Run quickstart.sh to generate tiles, start tileserver-gl and use inspect mode to see if the new abbrev attribute.
You should use also maputnik to change some style to show the new abbrev attribute as a final visual check. Printscreen would be fine.

[nicooprat]

Glad to see this feature coming back! But I still can't find iso names in https://free.tilehosting.com/data/v3.json?key=..., so I guess it's waiting some release? How can we now when it will be available? Thanks.

[jirik]

Yes, we are waiting for 3.7 release and deploy. We are already working on it, should be available till December 10 at free.tilehosting.com

[nicooprat]

Working great, thanks!