Using technical methods to de-identify or blur sensitive area information.
In short, any capable country will utilize technology, management, and legal measures to protect such mapping data.
As for the seabed topography mapping of critical navigation routes...
Although with the development of Huaxia's underwater cluster research and exploration projects, obtaining this information is only a matter of time, it is currently of exceptionally high value.
As for various records, they are even more useful.
Not only can they analyze the command strategies of conflicting parties, but through expert analyses, they can also pinpoint the personality traits of key individuals, effectively employing strategies, identifying strengths and weaknesses... Just like the saying in The Art of War by Sun Tzu, "Know yourself and know your enemy, and you can fight a hundred battles without losing."
