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Point clustering #753
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@zakjan I have not had to do clustering server-side yet, but it looks like the functions you need are availalbe in PostGIS. Have you played with ST_ClusterDBSCAN yet? If you do dive into using this function, I would be interested in seeing the solution you come up with as I think it could help others. I'm happy to help with the research if need be. |
@zakjan did you ever get anywhere with serverside clustering? I would love to hear your progress if you did. |
Definitely possible. Say you have a bunch of points in your provider. You create two layers.
Then building your map, you use the first layer with the center points of the clusters from zoom level x to y and the second layer from y to z. For static geometry data I suggest to create the cluster center points and store them in the database. For infrequently changing point data I suggest caching and for frequently changing data I suggest either a big database instance or another approach. |
@iwpnd thats a really clever idea! I’ve got relatively static data AND a big database server, so I think I can cache these clusters in the db and judiciously update with triggers. Thanks for the insight! 🙂 |
@ARolek @edtjones I created an example over at iwpnd/tegola-cluster-points. I didn't really bother with performance here but from what I can see, this seems viable. |
Wow - great! Thanks Ben.
… On 5 Feb 2022, at 15:36, Ben ***@***.***> wrote:
I created an example over at iwpnd/tegola-cluster-points. I didn't really bother with performance here but from I can see, this seems viable.
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I'm going to close this issue for now. Thanks for helping @iwpnd |
Is it possible to implement server-side point clustering with Tegola, for use cases with high point count and low zoom level?
Currently it's possible with custom implemented Node.js service using supercluster and vt-pbf, connected to PostGIS data source. I'm looking for an out-of-the-box solution.
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