map wobbles during incremental zoom

[meetar]

trafficstars

Most noticeable with very slow zooms, and most often detected during the ease-out of touchpad zooms.

Interestingly, a Leaflet marker placed on the map also wobbles, but in a different, more jittery pattern:

[dmvaldman]

Perhaps an artifact of rounding?

[bcamper]

I think the theory from the last time we looked at it was that it's a series of conversions (for example: screen -> latlng -> mercator) that has a cumulative error. But it needs more investigation.

@meetar - can't remember, but can you try this with zooming set to be fixed on map center point (it's a Leaflet option somewhere), it will be useful to know if this also happens in that case.

[dmvaldman]

This is a problem due to rounding in Leaflet. There's an ongoing discussion about it here

[meetar]

Confirmed - commenting out Leaflet's point class _round function removes both map wobble and marker wobble.