quadtree_grid aggregation

[yavuzmester]

We are drawing heatmaps with quadtrees. For each 256px tile, we dive 8 levels in the quadtree and find the pixel value that way.

In elasticsearch we can have a location field with the following mapping:

location: {
type: geo_shape,
tree: quadtree,
tree_levels: 25,
points_only: true
}

But there is only geohash_grid aggregation. What about quadtree_grid aggregation where in the response keys are paths like [0,2,1,3,0,1].

[clintongormley]

@nknize any thoughts?

[jpountz]

FixitFriday: removing the discuss label and assigning to Nick. This soulds like a useful feature but we need to validate whether we can execute such an aggregation efficiently.

[elasticmachine]

Pinging @elastic/es-search-aggs

[thomasneirynck]

Agreed this would be useful for heatmap drawing on the front-end, so +1 from me. Seems like a somewhat similar request to #16895 (comment)

[nyurik]

I just submitted a pull request #30231 with plus code support - I think that PR can be used as a step towards multi-hashing support.

[talevy]

Hi @yavuzmester,

We have created a new geotile_grid aggregation that buckets using the quadkey tiling strategy: https://www.elastic.co/guide/en/elasticsearch/reference/7.0/search-aggregations-bucket-geotilegrid-aggregation.html.

Does this enable your use-case? You still only are returned a representation of the bucket, and need to use client-side logic to translate each bucket into a visual tile on a map.

[nyurik]

@yavuzmester you might also be interested in #39810

[polyfractal]

I'm going to close this, since I think the geotile_grid satisfies the requirement for now, with followup from #39810 as mentioned.