https://eprints.soton.ac.uk/427175/1/Spatial_Representation_Framework_with_affiliation.pdf
W Jeamwatthanachai, M Wald, G Wills - Journal of Enabling Technologies, 2018
Purpose-The research aims to find an appropriate framework for spatial representation, aka Spatial Representation Framework (SRF), to define spaces and buildings targeted at indoor navigation by people with visual impairment …