Overlapping Clusters despite high clusterRadius

[PauloRicca]

Hi everyone,

I think we're seeing a bug with feature reduction, where in some rare but consistent places, the clusters overlap at certain zoom levels, despite having a high clusterRadius configured (150px):

These are "real clusters", not ghost images as other people have reported on this forum, which we've also seen on earlier versions of arcgis js. Overall clustering behaviour seems to have been generally improving over the last few arcgis js versions, but this one has been lingering, still happening on 4.22.0.

Is this happening to anyone else and do you know any way of going around it?

Thanks in advance!

Paulo

[KristianEkenes]

Hey Paulo,

Can you send a link to a simple test application in a codepen so we can reproduce the issue?

Thanks,

Kristian

[PauloRicca]

Hi Kristan,

Thanks for getting back to me. Unfortunately, it's not very simple to show our exact problem on a codepen as the data is confidential but if you go on this page: https://developers.arcgis.com/javascript/latest/sample-code/featurereduction-cluster/ I can see the same problem happening with a radius set to 100px:

[KristianEkenes]

Ah yes. That is a known issue. Some of the clusters are broken apart on tile boundaries. We have an open ticket for fixing this, but no timeline has been set for it. I'll link this thread to the issue. Thanks for bringing it up again.

[KristianEkenes]

This should be fixed in the next update of the JS API (v4.29).

[KristianEkenes]

You can test it out using https://js.arcgis.com/next/