Define the style and display a polygon for a specific administrative boundary that you choose, to highlight an area that is important to your users. The region lookup utility makes it easy for you to use Place IDs at no cost to find the Google administrative boundaries you want. You can customize fill and stroke color, fill and stroke opacity, and stroke weight for each feature.

Region lookup utility Read the documentation

Data-driven styling enables you to highlight an area that is important to your users. Style a polygon to provide context or focus the user's attention on an area of interest important to your use case.

Style a polygon - documentation

Utilize rich boundary data from Google. Access feature data for administrative areas such as countries, localities, postal codes and more. Visit the Google boundaries coverage page to view coverage on a country-by-country basis, and use the viewer to search for boundaries by name.

Click on the blue dots in this map to explore places listed in Wikipedia, and see how polygons help showcase the area they are located in. And click through the menu on the right to explore administrative boundaries from postal codes up to countries.

Google boundaries coverage

Enhance your tabular business data with Google’s administrative boundaries to create choropleth maps that tell stories through data, allowing fluctuations in metrics to be visualized across a region. Choropleth maps can be used to style multiple administrative areas such as countries, localities, postal codes and much more. Use your data to style an administrative area boundary by a range of data, such as home prices, hotel nightly rates, health metrics, flood zones and election results.

Use the region lookup utility to find the Google boundaries you want to enhance to your tabular data with. Click the icons on the right to see examples of choropleth maps that are styled by the number of points of interest per boundary.

Make a choropleth map - documentation

Data-driven styling provides support for interactive user experiences through click events, which return metadata to your apps, including Place ID, feature type, and display name of the clicked polygon. These events are useful for experiences where you wish to restyle the map based on user interactions.

The Place ID shown here can be used to apply styling to a specific polygon in a feature layer, such as a specific city or country.

Handle click events - documentation