所以，我的問題是 - 我可以先下載到我的電腦和稍後轉移到Android手機嗎？ （如果離綫地圖也可以在PC內部觀看，這會更好。這意味著離綫地圖可以在多個設備上使用 - 可移植性！）
I notice that many maps vendor such as Google require user to download offline map using their android phone. At the worst case, the user need to setup internet connection point in which the android phone will use the PC's internet to retrieve those offline map.
So, my question is - are there really pure offline map that I can first download to my PC and later transfer to the android phone? (It would be better if the offline map can also be view inside the PC too. Meaning that the offline map can be used on multiple devices - Portability!)
I use OsmAnd which works well with offline maps (OSM). Download offline map(s) once and after that no internet connection is required to use them.
You can download the .obf-file of your location from this list of offline maps. Or use the app to download .obf files directly to your device.
There's an excellent mapping app called Locus (website | app free | paid) which has been around for ages and offers a whole lot more features than Google Maps. It supports offline map caching and it looks like you can download vector maps from here, topographical maps from here.
Having downloaded one of the vector maps, it seems to be using OSM files, which have a whole load of viewers for the desktop.