Protectionism with Chinese Characteristics It's a pretty common tactic. Cite "national security" or any other vaguely plausible reason to deny access to non-favored firms (foreign companies, and local companies who don't have the "connections"). If anyone complains, government spokesperson and 50 cent mafia generate lots of angry nationalistic crying. If another country retaliates, same spokesperson and 50 cent mafia…
One can question their methods. Still why should they let foreign companies map their country? Technology and information assets like everything else. They might be the natural resources of the 21st century. And a lot of countries might be giving up their chance of becoming the next Norway without even knowing it.
Europe doesn't have a Google, Facebook, or Amazon, because the major US companies got there early enough to dominate the entire market. I wouldn't necessarily say that that's a good result for those countries.