Cluster layer goes blank

Describe the bug As said the Cluster Layer goes blank when zoom out at small zoom level, the official demo can reproduce.

Change the earthquakes demo point layer to cluster

Then zoom out.

[heshan0131]

My bad, you were talking about the cluster layer, yea I was able to reproduce this, will investigate

[akre54]

TLDR: https://github.com/mapbox/supercluster/issues/86

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Ok I tracked down the issue. At low zoom levels it’s possible for geoViewport.bounds to return a minimum longitude that is < -180 or > 180, resulting in a bounding box where the minimum is larger than the maximum.

So for example:

longitude: -109.6070260234451
latitude: 30.862131808723703
zoom: 4
width: 1680
height: 851

const bbox = geoViewport.bounds([longitude, latitude], zoom, [width, height])
// [-183.427734375, -4.959615024698014, -35.771484375, 57.06463027327855]
// note the -183 longitude

A simple fix for this is to clamp the longitude to between -180 and 180, as Supercluster already does for latitudes (not sure why longitudes don’t get this fix).

Update: it looks like they already fixed this: https://github.com/mapbox/supercluster/issues/86. Will bump Kepler’s package version.

IMO this is a bug in geoViewport.getBounds since it is an invalid coordinate, but this fix should work for now.