DepartmentofLandSurveyingandGeo-Informatics;
HongKongPolytechnicUniversity;
Kowloon;
HongKong;
P.R.China;
DepartmentofLandSurveyingandGeo-Informatics;
HongKongPolytechnicUniversity;
Kowloon;
HongKong;
P.R.China//SchoolofCivilEngineering;
TongjiUniversity;
Shanghai;
200092;
P.R.China;