[ryandrake]

It's not just borders. When you produce a map for the China market, you need to make certain islands prominent, and physically larger than they actually are, because South China Sea Politics. I can't find a link to cite, but this is well known among people in the mapping business.

Even their GPS coordinate system is different than the rest of the world. Most of the world has settled on WGS-84, but when you display GPS points on a map of China, you need to convert them to their own somewhat randomly-obfuscated coordinate system [1], and display all map data in that datum as well.

Because of these kind of special-snowflake rules, when you're making any kind of geographic software, you usually have to make two versions: One for China and one for everyone else. Not unlike dealing with the USA's insistence on using imperial measurement systems while most of the rest of the world has standardized on metric.

1: https://en.wikipedia.org/wiki/Restrictions_on_geographic_dat...