China requires all digital maps to have
pervasive
random errors.
I suppose the US government has made accurate maps of China from
satellite data, but they are not available to the Chinese. At least,
not today. It would be a great propaganda coup for the US to publish
them.
Is Open Street Map at work on China? Contributions would have to be
made in secret, but they could be made.
The most disturbing statement in the article is that GPS devices have
back doors so that China can order them to shut down or give erroneous
answers. Of course, China would impose this on products sold in
China; perhaps on all products made in China, such as iThings. And
that would include most devices — but are there no exceptions?