GPS Positioning: What does local navigation mean?

But literally, it should only be the navigation of local maps.

A long time ago, haha! When navigation was first introduced, some maps were divided into national and local versions.

The national version has maps all over the country, and the local version only has local maps, but it is more detailed and refined than the national version. If you don't travel far, the local version is enough.

But this is an old calendar book, so it's hard to say what you mean. For reference only!