Department of Geomatics Engineering, University of Calgary 2500 University Drive N.W., Calgary, AB T2N 1N4 Canada ; Pacific Institute for the Mathematical Sciences, University of Calgary 2500 University Drive N.W., Calgary, AB T2N 1N4 Canada
Department of Geomatics Engineering, University of Calgary 2500 University Drive N.W., Calgary, AB T2N 1N4 Canada