How to get nested object properties for style specification

[glaroc]

Hi, I have a PMTiles file with polygon properties in a nested structure like this,

properties:{"species_counts":{"id13":3,"id15":5}}

Now, I want to style each feature, based on the value of id13, for example. I've tried to get the nested object property with something like

"fill-color": [
     "case",
        [">", ["get", "id13", ["get", "species_counts"]],0],
      "orange",
      "blue",
]

but anytime I try to put a nested "get" like this, nothing works. Any ideas on how to do this ?

[HarelM]

Don't use nested objects is the best advise I can give you I think...
Nested objects are not well supported in the mvt spec, they get covered to strings, which isn't very useful...

[glaroc]

OK, thanks. This seemed possible with Mapbox (https://stackoverflow.com/a/74574816/511575), so I was under the impression that it would also work with Maplibre. I'll try to unnest my data structure.

[HarelM]

I'm not sure how correct this SO question is to be honest, but I might be wrong...

[glaroc]

See also: https://stackoverflow.com/a/56569263/511575

[HarelM]

In that case, you have your answer :-)

[glaroc]

As mentioned in the question, it doesn't seem to work with Maplibre for some reason.

[wipfli]

Flatten the nested data for example like this:

{"species_counts":{"id13":3,"id15":5}}

flatten to

{
  "species_counts:id13": 3,
  "species_counts:id15": 5
}