Sets the colorscale. The colorscale must be an array containing arrays mapping a normalized value to an rgb, rgba, hex, hsl, hsv, or named color string. At minimum, a mapping for the lowest (0) and highest (1) values are required. For example, `[[0, 'rgb(0,0,255)'], [1, 'rgb(255,0,0)']]`. To control the bounds of the colorscale in color space, use`zmin` and `zmax`. Alternatively, `colorscale` may be a palette name string of the following list: Blackbody,Bluered,Blues,Cividis,Earth,Electric,Greens,Greys,Hot,Jet,Picnic,Portland,Rainbow,RdBu,Reds,Viridis,YlGnBu,YlOrRd.

Sets the key in GeoJSON features which is used as id to match the items included in the `locations` array. Only has an effect when `geojson` is set. Support nested property, for example *properties.name*.

Sets a reference between this trace's geospatial coordinates and a geographic map. If *geo* (the default value), the geospatial coordinates refer to `layout.geo`. If *geo2*, the geospatial coordinates refer to `layout.geo2`, and so on.

Sets optional GeoJSON data associated with this trace. If not given, the features on the base map are used. It can be set as a valid GeoJSON object or as a URL string. Note that we only accept GeoJSONs of type *FeatureCollection* or *Feature* with geometries of type *Polygon* or *MultiPolygon*.

Determines the set of locations used to match entries in `locations` to regions on the map. Values *ISO-3*, *USA-states*, *country names* correspond to features on the base map and value *geojson-id* corresponds to features from a custom GeoJSON linked to the `geojson` attribute.

Sets the coordinates via location IDs or names. See `locationmode` for more info.

Sets the source reference on Chart Studio Cloud for `locations`.

Reverses the color mapping if true. If true, `zmin` will correspond to the last color in the array and `zmax` will correspond to the first color.

Sets the text elements associated with each location.

Determines whether or not the color domain is computed with respect to the input data (here in `z`) or the bounds set in `zmin` and `zmax`  Defaults to `false` when `zmin` and `zmax` are set by the user.