SH,
Google earth is a free download from the Google site. It's mailnly satellite based photographs of the whole world. Many city areas are in high deffinition so that you can zoom right in and practically see the roses in the gardens. The data base is updated every few years, the current ones being two or three years old. Google also has higher levels of this programme but these are for businesses like architects who pay for the better versions. You won't need this, they are not for private use anyway. Be careful though. This programme is absorbing. Time flys by and it's easy to forget to put the supper on.
Regards.