This item is available under a Creative Commons License for non-
commercial use only Spatial awareness is identified as a key
feature of today's mobile devices. While outdoor navigation has
been available and widely used for some time already with the
help of GPS, indoor positioning has not yet made it into
mainstream life. GPS and other GNSS systems offer accuracy of a
scale different to that required for efficient indoor
navigation. Due to this and poor signal quality in urban
environments, a lot of effort has been put into developing
dedicated indoor locationing systems. However, many such systems
use specialized hardware to calculate accurate device position,
as readily available wireless protocols have so far not
delivered accuracy close to what is desired. This research aims
to investigate how a number of sensors such as a Digital
Compass, Bluetooth, WiFi, and Accelerometer may be combined to
calculate device position and orientation to perform directional
querying in a spatial database. These four techn