WiFiLine's advantageous features

Indoor navigation is not a matured market yet, but several products similar to WiFiLine are already available: some of them can be evaluated, and some can be used commercially in a restricted environment (equipped with a special hardware). This is why I'd like to mention the most important advantages of WiFiLine:

1. It's free.
2. It's based on open standards, for example, the map format is based on XML/SVG and well documented, there is no proprietary stuff.
3. It may work with local maps (saved on a device) without any dependency from a server. No Internet connection required.
4. It does not require special and usually expensive hardware to be installed on a venue.
5. The map uses vector format (SVG) which provides high quality of images, arbitrary level of details, and rich zoom-in/zoom-out possibilities.
6. You can work with your own maps using WiFiLine Editor.

BTW, now I know (or at least I think I know) how to use environmental magnetic field for navigation, which was covered by one of previous posts - On Earth's magnetic field in navigation indoors. It still requires some research, but idea is clear and ready for prototyping. I'll let you know how it goes.