Wayfinding can be defined as spatial problem solving. It is knowing where you are in a building or an environment, knowing where your desired location is, and knowing how to get there from your present location. Wayfinding is particularly important in complex built environments such as urban centers, healthcare and educational campuses, and transportation facilities. As architectural environments become more complicated, people need visual cues such as maps, directions, and symbols to help guide them to their destinations. In indoor, GPS doesn’t seems to work indoors as the satellite links are blocked or unreliable inside buildings. Indoor navigation and wayfinding is important as it may be used to find a shop in a shopping mall or locations in a hospital.