C V. Tao / J. Li, Advances in Mobile Mapping Technology, 2007, p. 43, Abstract ([Internet, 2019-03-13](https://books.google.ch/books?id=tWUfPdng_o0C&pg=PA43&lpg=PA43&dq=%22RTK+positioning+service%22&source=bl&ots=dJUKOMu1jQ&sig=ACfU3U2d9B8bSe4BcbWG2jTHD3Mdon3Stg&hl=de&sa=X&ved=2ahUKEwjy5vLIzv7gAhUSElAKHd2WDf4Q6AEwBHoECAQQAQ#v=onepage&q=%22RTK%20positioning%20service%22&f=false))