I work in local government doing GIS. You don't use Google aerial imagery, and if you were to do that it would be outside their data sharing terms of service. We personally get other more detailed aerial imagery provided through a public licence agreement specifically for government. There are also much more relevant green space vector datasets that you should be using before using aerial imagery and object classification for any of the tasks you mentioned. Some people in other areas of my local government will use Google maps for some basic tasks, but it is mainly because they don't know what GIS is.