Can a heatmap represent the value of a property across a map rather than points density?

[chseluv]

I have a map where I will be placing a lot of user-submitted markers. Each marker, a GeoJSON point, will represent an item that has a set of feature properties. I don't need to show how many markers appear close to each other, that is irrelevant to my plot. I'd rather show the user where specific values for that property reside with higher frequency on the map.

Is this something a heatmap could do in Mapbox-GL JS?

I was considering tying the heatmap-color to some property expression. Does anyone know if or how this is achievable?

[mourner]

You can try creating multiple heatmap layers, each for the specific value range that you want to show density for. Otherwise I don't have any tips to offer — the heatmap layer is specifically designed to show point density.

[tempranova]

Is there any way to open this up again? I think there is a good use-case to have heatmaps coloured in ways other than only by density.

For an example: my client wants to show a heatmap of the shots gained per shot on a golf course. He wants a heatmap that shows shots not by their density, but a mix according to the shots gained property. I can't currently implement a custom color scheme by a property on the data on the heatmap: the only way to do it is by density.

For example, see this request about QGIS: https://gis.stackexchange.com/questions/192158/styling-a-heat-map-based-on-point-attribute-not-density

Any chance of getting this implemented?

[ryanbaumann]

You can use an approach like this to aggregate spatial data for a heatmap based on property values today @tempranova - https://bl.ocks.org/ryanbaumann/a8d7016227a7aaefd18ab93ff6c95102/c3f33b2ba7a218b16db8318ec03779ffa5de1bd6 before the new #7584 feature is finished.

[Obi-Dann]

Wondering if it’s possible now with #7584 merged. Looked at the documentation and the source but couldn’t find a way to do it.
@ryanbaumann do you have any advice? Thanks!

[cscetbon]

Same @ryanbaumann @mourner I'm not sure this answered the question. Any example on how to do it to create a heatmap based on temperatures for instance ?

[cscetbon]

You can try creating multiple heatmap layers, each for the specific value range that you want to show density for. Otherwise I don't have any tips to offer — the heatmap layer is specifically designed to show point density.

@mourner Have you ever tried this ? Do you have an example showing that it would work ?