Allow for lowering zoom levels

[thibaultmol]

Def if you're exploring data on osm using the "map data" layer in the layers tab, it would be nice to be able to zoom in more than the current z zoom limit

[deevroman]

The main problem here is that if you set maxZoom greater than the maximum zoom of the layer (OSM Standard = 19), then nothing will be displayed on the map except for the gray background.

maxZooms:

CyclOSM = 20
CycleOSM = 21
TransportMap = 20
TracetrackTopo = 19
Humanitarian = 20

For now I do not know how to enable the overzoom in Leaflet.

[thibaultmol]

ah right, guess this'll be solvable once osm org uses the osm vector tiles... actually.. could you use js to switch to vector tiles or is that too much work (and not worth it, just wait till osm does it themselves?)

https://weeklyosm.eu/archives/17587#:~:text=Vector%20tiles%20are,as%20a%20map.

[deevroman]

Okay, that's how it works:

map.options.maxZoom = 23
var layers = []
map.eachLayer(i => layers.push(i))
layers[0].options.maxZoom = 23

It remains to understand why this works, and when this code should be run :)

For example, this would also be useful for such changesets: https://osm.org/changeset/160584534

[deevroman]

in 0.7, a setting was added that enables overzoom when the Map Data layer is active. This option is disabled by default, because sometimes you can see gray tiles.