Z20 needed

[JLZIMMERMANN]

Expected behavior

I contribute in south of France and we have reached a high level of details. This is why the classic rendering of osm.org isn't enough for us. I wish to improve the data quality for disabled people and a higher level of zoom is welcome. By this way we would be able to display more POI like street lamp, parking space for disabled,..

Actual behavior

At Z19 sidewalks are quite difficult to see because too narrow to the main road.

Screenshots with links illustrating the problem

Christian Quest pushed a similar rendering than osm.org but with french details (local logos).
In the picture I show with a red circle : street lamp, crossing, disabled parking. The map is centered in Orange,France where I live

[imagico]

This seems to be about a number of different points:

• road width at z19 line width above physical width - see Utility poles rendered within tertiary highways at z16 to z18 #3925.
• ground unit rendering of roads at high zoom levels - see Variable width line features at high zooms #1290 , could be reopened.
• feature request for pedestrian crossings - already covered by Pedestrian crossings not visible #1943.
• feature request for street lamps - see render highway=street_lamp at z=19 #3277, could be reopened for z20.
• feature request for disabled parking - see Please render amenity=parking + capacity:disabled>0 #81, could be reopened.
• request to OSMF operations to extend rendering to z20 - that is a matter for the OSMF, not for this style.
• request to in general improve the cartography at z19/z20 - contributions to that would be welcome but it is very challenging to create good high zoom level map design that is not just an extrapolation of the lower zoom levels plus more static POIs (currently limited by the lack of a scalable prioritization system for POIs - see Symbol and label prioritization is not in sync with the starting zoom levels #3880) in a way that offers good enough performance to be real time rendered. Most components that would be useful for that (in particular ground unit rendering - see above) would also add quite significant code complexity. If you want to suggest anything specific in that regard please open a distinct issue about it.

Please feel welcome to comment on any of the issues linked to above with arguments to re-open or other comments - like specific implementation suggestions from the french style.

[JLZIMMERMANN]

Thanks for your answer. As you answered I think you could improve level Z19 to prepare the answer of OSMF to push Z20.
At Z19, there are already some great features missing : streetlamp, disabled parking, crossing.

[Adamant36]

I think you could improve level Z19 to prepare the answer of OSMF to push Z20. At Z19, there are already some great features missing : streetlamp, disabled parking, crossing.

Rendering the style at Z20 is something that I've been advocating for myself. That said, IMO it makes more sense to request the OSMF implement it regardless of what is or isn't currently rendered at Z19. Otherwise there's two possible problems 1. Everything you "improved" at Z19 has to be re-discussed and re-implemented once Z20 is 2. If the OSMF rejects the idea then you've essentially turned Z19 into a dumping ground for a bunch of random tags that wouldn't have been viable to render otherwise because they just add clutter to the map.

[jeisenbe]

This is a duplicate of other issues, and previous requests for adding support for z20 and z21 were closed in #3686 and #4145

We would welcome any new contributors who would like to improve the rendering at z19 (which has only been worked on in a limited fashion) and add more rendering adjustments at z20. Please submit a PR with any specific ideas.

[imagico]

Noticed that the above sample is not from the french style or from a different branch on https://github.com/cquest/osmfr-cartocss. Are those modifications public? CC @cquest.

So far the specific designs at z20+ in the french style seem to be:

• enlarged trees
• elevators/escalators
• sport field markings
• bollards at crossings