The German government has called for internet companies to draw up a data protection code following security concerns over Google Street View.
Thomas de Maiziere , the German interior minister, said the guidelines will force companies to work out how to protect data which could compromise the privacy of individuals.
According to German paper Der Spiegel, several hundred thousand people have opted out of Google Street View
Google wants the mapping service of 20 German cities live by November 2010, but extended the deadline for users to opt out until 15 October.
In May, Google admitted that it had mistakenly collected data sent over Wi-Fi networks using its Street View cars.