Google and Apple will use new hi-tech mapping planes that can film through skylights and windows, putting privacy at risk, the Daily mail reported.
The technology is similar to that used by intelligence agencies in identifying terrorist targets in Afghanistan, the report said.
Google has admitted to having sent planes over cities, while Apple has acquired a firm using spy-in-the-sky technology that has been tested on at least 20 locations, including London.
The search engine giant will use its spy planes to help create 3D maps with much more detail than its satellite-derived Google Earth images.
Google expects by the end of the year to have 3D coverage of towns and cities with a combined population of 300million. It has not revealed any locations so far.
Apple is expected to unveil its new mapping applications for its iPhone and other devices today
