Visualize non Austria ZIP codes

How can I visualize a table in Metabase which contains entries of a metric (let`s assume population count) for each ZIP code.

However, I am not looking at US ZIP codes, rather Austrian ZIP codes.
How can I tell Metabase to put them on a map like Tableau?

I already have denoted the type of the column as ZIP code type, but only get an empty visualization with the whole world in the chart (not the specific country or subdivisions in that country)

Hi @geoHeil
You need to add a custom GeoJSON map (which has a region identifier matching the ZIP codes):

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