Location information in WSNs is an important block in the information retrieved for the deployed sensor nodes. The sensor node’s task is to sense a specific environmental effect like humidity or pressure. The information collected from the network usually contains the information regarding the sensed event and the sensor node that initiated the sensing activity in the network. The location information of the sensed phenomena is of great importance to the end user because it uncovers the behaviour of the environment being monitored and how the sensed event has an effect on that environment. Location information is important also to apprehend a source of an undesirable activity (e.g., fire protection systems).
