European road network

[attilakundev]

Referring to this conversation:
https://osmus.slack.com/archives/C01V02K52UX/p1640606101380400

[attilakundev]

https://www.openstreetmap.org/relation/2093784 an example European E-road relation (E75 in Hungary)
https://en.wikipedia.org/wiki/International_E-road_network
You can use the markers seen in Wikipedia because that is the most standard one

[Mashin6]

Also national highway shields. I can help drawing or locating pictures.
e.g. Germany https://upload.wikimedia.org/wikipedia/commons/6/6e/Bundesautobahn_38_number.svg
Slovakia https://upload.wikimedia.org/wikipedia/commons/6/6b/D1-SVK-2020.svg
Czechia https://upload.wikimedia.org/wikipedia/commons/9/9b/CZ_traffic_sign_IS16a_-_D0.svg

[ZeLonewolf]

If anyone is motivated to start working on adding these shields, #72 has instructions on how to do that prior to OMT 3.13 being available. PRs can be posted to the branch https://github.com/ZeLonewolf/openstreetmap-americana/tree/openmaptilers-new-features-test.

SVG artwork should be generated with a max size of 40px along the shortest dimension, with a recommended stroke size of 2.5px.

[1ec5]

Some of the U.S. shields in #72 are derived from public domain images on Commons, so the images linked in #69 (comment) could be a good starting point.

[Mashin6]

[attilakundev]

@Mashin6 Looks nice!

[Mashin6]

Here is Hungary

[attilakundev]

Awesome! I guess then the primary route shields will be similar to this :D take a screenshot of route 3 - route 24 intersection in Gyöngyös please

[ZeLonewolf]

With @Mashin6's code updates to #72, this issue will close once the highway shields branch can be merged. Other shield networks that need to be rendered should open new issues with artwork samples.

[attilakundev]

Alright, I checked the code, so i saw the HU:national there but since the network is kindof weird, since those which start with M are motorways, which doesn't have the M are green colored and not blue, like here: https://en.wikipedia.org/wiki/Main_road_3_(Hungary)#/media/File:3_(Hu)_Otszogletu_zold_tabla.svg

[Mashin6]

Yeah, those minor once should have a separate network like HU:primary or something like that.

[attilakundev]

I don't know, I think Hungarians will stick to HU:national for those which are signed and HU:regional which are unsigned, so a filter like regex couldn't work for checking if the ref has the M or not?

[Mashin6]

@ZeLonewolf Maybe by hardcoding color replacement in shieldLighten() or some new function?

[Mashin6]

Switzerland

Italy

[Mashin6]

Czech Republic

[ZeLonewolf]

@ZeLonewolf Maybe by hardcoding color replacement in shieldLighten() or some new function?

That's the right idea. If the shields are the same design but just different colors, we can use the shieldLighten() approach, otherwise we would need to implement new functionality for returning a shields as a function of ref for special cases.

[Mashin6]

Austria

[Mashin6]

Croatia: