input: [Cookie] Google Maps [Cookie name(s)] SID, SAPISID, APISID, SSID, HSID, NID, PREF [Data stored] Various unique identifiers, except for PREF which stores your options such as preferred zoom level. [Description] Google set a number of cookies on any page that includes a Google Map. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google Maps users. The PREF cookie appears to store information about your preferences regarding the Google Maps service. In doing so information about your use of our website, including your IP address, may be transmitted to Google and stored on servers in the United States Google's Privacy Policy Opt out of Google Analytics [When does it expire?] 
output: Most of the cookies expire 10 years after your last visit to a page containing a Google Map. The PREF cookie expires 18 months after your last visit to a page containing a Google Map.