Boston Consulting Group, ‘Geospatial Services: A $1.6 Trillion Growth Engine for the US Economy’, accessed May 8, 2013, http://www.bcg.com/documents/ file109372.pdf – as cited by Woodgate, P. W., Coppa, I. and Hart, N. (2014), ‘Global Outlook 2014: Spatial Information Industry’. Published by the Australia and New Zealand Cooperative Research Centre for Spatial Information.