Google Street View provides 360° horizontal and 290° vertical views of streets from various positions in Google Maps and Earth.
Private residents in the US objected to the service, while several governments protested in Europe. Last month, the EU asked Google to modify Street View to protect people's privacy.
Bloomberg has reported Google as saying that retaining high-resolution images of streets is legitimate and justified. The search engine behemoth said it had committed to a 12-month retention period from the date on which images are published on Street View.
To reduce the storage time of street images, Google will have to reshoot the pictures to replace the current ones, which would mean covering Europe every six months.