Is there a way to design OpenStreetMap similar to the aesthetic of coronavirus.app?

Exploring the realm of OpenStreetMap, leaflet, and map tiles has piqued my interest!
My initial goal is to create a visually appealing map for data visualization. Having past experience with styling maps client-side through Google Maps, I encountered a roadblock when attempting to style OpenStreetMap maps - it seems that the styling must be done server-side.

So, how does a website like coranavirus.app achieve this? Upon inspecting their site, it is clear that they are using the standard OSM png tiles. How do they transform these into the light/dark map theme?

https://i.sstatic.net/Md97o.png



Any tips or insights would be greatly appreciated!

javascriptgisopenstreetmapopenmaptiles

Answer №1

When you examine the .leaflet-tile-container element, you will notice that it is applying a CSS filter:

:root{
  /* ... */
  --mapfilter: grayscale(1);
  /* ... */
}

/* ... */
html body.dark{
  /* ... */
  --mapfilter: invert(1) grayscale(1);
  /* ... */
}

.map-layer, .leaflet-tile-container {
    filter: var(--mapfilter);
    -webkit-filter: var(--mapfilter);
}

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