maxCityNetworksToMonitor
The maximum number of city-networks to monitor for your resources. A city-network is the location (city) where clients access your application resources from and the ASN or network provider, such as an internet service provider (ISP), that clients access the resources through. Setting this limit can help control billing costs.
To learn more, see Choosing a city-network maximum value in the Amazon CloudWatch Internet Monitor section of the CloudWatch User Guide.