Marker clustering

[tmcw]

Yes, it's that issue you were kind of thinking of and expecting, I'm posting it.

• How should gl-js support clustering? Should it be a first-class style, built into the library by default, or a plugin?
• How should clusters be represented in vector tiles, if at all?

[mourner]

It would be nice to support it in a plugin, but the difficulty here is that we need to hook it up to worker code where the clustering would happen (in the same thread where tiles are processed and buffers are built). Is it possible to do that externally? Probably not.

How should clusters be represented in vector tiles, if at all?

Are we ready to support the server-side clustering use case? That would be a lot of work across the stack I guess...

[stepankuzmin]

As I understood, this behaviour is not marker clustering?

How can I deal with this behaviour? Can I specify radius which causes marker disappearing using style or something?

[mourner]

@stepankuzmin what's the source of the data here?

[stepankuzmin]

Hi, @mourner! It's GeoJSON source.

[mourner]

@stepankuzmin take a look at symbol properties here https://www.mapbox.com/mapbox-gl-style-spec/#symbol. It's not clustering, it's collision avoidance.

[stepankuzmin]

Oh, I see. Thanks for reply, @mourner!

Btw, is there are any plans for leaflet-like markers styling? I saw #1260 and #656, so maybe it would be something like L.divIcon which return gl context? It would be nice to have ability to style markers with all webgl power. Also it is not so easy to build custom markers using sprites if marker display depends on it's content. I mean that I must have sprite icon for every possible marker display. We've used animation with css transition with Leaflet, and so it would be great to have similar ability with Mapbox GL.

[mourner]

Happening in #1931