mapsAPIHandler1.cs

public class MapsAPIHandler
{
  public string googleStaticMapsAPIkey = "my_api_key";
  public string staticMapUrl = "https://maps.googleapis.com/maps/api/staticmap";
  public MapsRequest mapsRequest = new MapsRequest();
  
//builds the API request object
  public void GetStaticMapRequest(int width, int height)  {...}

  public IEnumerator DownloadMap(RawImage image, int width, int height)
  {
    GetStaticMapRequest(width, height);
    UnityWebRequest web = UnityWebRequestTexture.GetTexture(mapsRequest.Url);

    yield return web.SendWebRequest();

    if (web.result == UnityWebRequest.Result.ConnectionError)
        Debug.LogError(web.error);
    else
        image.texture = DownloadHandlerTexture.GetContent(web);

    web.Dispose();
  }