<P> Restrictions have been placed on Google Maps through the apparent censoring of locations deemed potential security threats . In some cases the area of redaction is for specific buildings, but in other cases, such as Washington, D.C., the restriction is to use outdated imagery . These locations are fully listed on Satellite map images with missing or unclear data . </P> <P> Due to restrictions on geographic data in China, Google Maps must partner with a Chinese digital map provider in order to legally show China map data . Since 2006, this partner has been AutoNavi . </P> <P> Within China, the State Council mandates that all maps of China use the GCJ - 02 coordinate system, which is offset from the WGS - 84 system used in most of the world . google.cn/maps (formerly Google Ditu) uses the GCJ - 02 system for both its street maps and satellite imagery . google.com/maps also uses GCJ - 02 data for the street map, but uses WGS - 84 coordinates for satellite imagery, causing the so - called China GPS shift problem . </P> <P> Frontier alignments also present some differences between google.cn/maps and google.com/maps . On the latter, sections of the Chinese border with India and Pakistan are shown with dotted lines, indicating areas or frontiers in dispute . However, google.cn shows the Chinese frontier strictly according to Chinese claims with no dotted lines indicating the border with India and Pakistan . For example, the South Tibet region claimed by China but administered by India as a large part of Arunachal Pradesh is shown inside the Chinese frontier by google.cn, with Indian highways ending abruptly at the Chinese claim line . Google.cn also shows Taiwan and the South China Sea Islands as part of China . As of May 2009, Google Ditu's street map coverage of Taiwan also omits major state organs, such as the Presidential Palace, the five Yuans, and the Supreme Court . </P>

How long did it take google to map the world