There is a post on it here. I hope it helps.
http://www.seomoz.org/blog/tracking-traffic-from-google-places-in-google-analytics
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1/17/2012 In this post I will explain how to handle cases of planned downtime. That is, a short period of time wherein you purposely make your website inaccessible. This can be due to significant changes to the site or because of server maintenance.
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