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Add --cluster-maxzoom option #956

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Oreilles
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@Oreilles Oreilles commented Nov 13, 2022

This PR adds the option to set the maximum zoom level at which features should be clustered. Syntax taken from the updated docs:

  • -k zoom or --cluster-maxzoom=zoom: Max zoom on which to cluster points if clustering is enabled.
  • -kg or --cluster-maxzoom=g: Set --cluster-maxzoom= to maxzoom - 1 so that all features are visible at the maximum zoom level.

I just picked the letter k as it was available, but this could be change to anything else if needed.

An alternative solution would be to use the already existing --base-zoom option to prevent clustering above the specified zoom. While possible, it could lead to unexpected result when using both -zg and -Bg, as the zoom at which most feature would be become distinct could be much higher than the one at which a tile crosses the 50k feature limit.

Fixes #934 and #799.
This PR, alongside #940 and #955 would bring feature parity and improved consistency with the supercluster library used to generate clusters in mapbox-gl-js.

@e-n-f
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e-n-f commented Nov 14, 2022

Could you please make this PR against https://github.com/felt/tippecanoe instead? The mapbox repo is essentially unmaintained now.

@Oreilles
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Done 👍

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clustering except for max zoom
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