topic Re: Overlapping Clusters despite high clusterRadius in ArcGIS JavaScript Maps SDK Questions

Overlapping Clusters despite high clusterRadius

PauloRicca — Thu, 13 Jan 2022 16:13:11 GMT

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

Re: Overlapping Clusters despite high clusterRadius

KristianEkenes — Fri, 14 Jan 2022 00:02:51 GMT

Hey Paulo,

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

Thanks,

Kristian

Re: Overlapping Clusters despite high clusterRadius

PauloRicca — Fri, 14 Jan 2022 09:12:06 GMT

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:

Re: Overlapping Clusters despite high clusterRadius

KristianEkenes — Fri, 14 Jan 2022 17:44:24 GMT

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.

Re: Overlapping Clusters despite high clusterRadius

KristianEkenes — Tue, 06 Feb 2024 00:25:26 GMT

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

Re: Overlapping Clusters despite high clusterRadius

KristianEkenes — Tue, 06 Feb 2024 00:26:02 GMT

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