| Summary: | As the population is growing rapidly, a small country becomes crowded, it is unavoidable that scarce land space will eventually run out in the event of inadequate urban planning. This urged countries with scarce spaces to build high buildings and utilize underground spaces. However, apart from buildings above ground, in times of emergency, underground spaces and high-rise buildings do not have the privilege of lateral evacuation routes to open spaces. Unless discussed, this displays potential risks to security and safety. Thus, a reliable and trustworthy navigation system for immediate evacuation in indoor environments is required.
|
|---|