Is geocoding API required when using geochart in google charts?

[ChangYoon Kim]

 I am currently using a geo chart from google chart.

Looking at the documentation on using the geo chart, I realized that I needed the 'maps javascript api' and added that api to the gcp project.

However, the following error was output to the browser console.

Google Maps API error: Geocoding Service: This API project is not authorized to use this API.....

So when I added the geocoding api to the gcp project, the corresponding error did not appear.

However, what I was wondering was that the geo chart was printed well without using the geocoding api. (Of course, the above error was output to the console.)

I am wondering if the geocoding api is essential for not displaying the marker on the map.

please answer about my question. Thank you.

The picture below is a geo chart that I am using. When hovering the cursor over an area, the tooltip function is used to display information.