PLAN Group, Schulich School of Engineering, The University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada; E-Mails: melania.susi@ieee.org (M.S.); valerie.renaudin@ifsttar.fr (V.R.)
† Present address: Nottingham Geospatial Institute, University of Nottingham, Nottingham, NG8 1BB, UK.
‡ Present address: GEOLOC Lab, IFSTTAR, 44344 Bouguenais, France.
* Author to whom correspondence should be addressed; E-Mail: gerard.lachapelle@ucalgary.ca.
Received: 1 December 2012; in revised form: 18 January 2013 / Accepted: 22 January 2013 /
Published: 24 January 2013