set
@NonNull()
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Sets the map's [projection](https://docs.mapbox.com/mapbox-gl-js/style-spec/projection/). If called with `null`, the map will reset to Mercator.
Return
string describing an error if the operation was not successful, empty otherwise.
Parameters
properties
A map of style projection values, with their names as a key.Supported projections are: * Mercator * Globe