48313f73f6
* [Maps] add unique count metric aggregation * do not format unique_count aggregation results * do not format value in legend for unique count * update heatmap docs * one more doc change
19 lines
824 B
Plaintext
19 lines
824 B
Plaintext
[role="xpack"]
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[[heatmap-layer]]
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== Heat map layer
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In the heat map layer, point data is clustered to show locations with higher densities.
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[role="screenshot"]
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image::maps/images/heatmap_layer.png[]
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You can create a heat map layer from the following data source:
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*Grid aggregation*:: Geospatial data grouped in grids with metrics for each gridded cell.
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Set *Show as* to *heat map*.
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The index must contain at least one field mapped as {ref}/geo-point.html[geo_point].
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NOTE: Only count, sum, unique count metric aggregations are available with the grid aggregation source and heat map layers.
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Average, min, and max are turned off because the heat map will blend nearby values.
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Blending two average values would make the cluster more prominent, even though it just might literally mean that these nearby areas are average.
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