iii 
EFFECTIVENESS OF MENU-DRIVEN VS. SCRIPT-BASED GIS TUTORIAL SYSTEMS 147 
81 b. LI, Central Michigan University (U S.A.) 
BUILDING OF B/S-BASED OBJECT ORIENTED ELECTRONIC CHART DATABASE 151 
G. R. LI, S. P. SUN, D. P. ZHAO, Dalian Maritime University (P. R. China) 
87 
MINE GIS 3D DATA MODEL AND SOME THINKING 154 
Q. Y. LI, D. Y. CAO, X .D. ZHU, China University of Mining and Technology (P. R. China) 
93 
THE RESEARCH OF THE INFINITELY VARIABLE MAP SCALE IN GIS 159 
Y. F. LI, S. P. SUN, Dalian Maritime University (P. R. China) 
98 RESEARCH ON INFORMATION AUTOMATIC GENERALIZATION WITH VARYING MAP SCALE 162 
Y. H. LI, D. LIU, Y. F. LI, Dalian Maritime University (P. R. China) 
103 QUANTITATIVE MEASURES FOR SPATIAL INFORMATION OF MAPS 164 
Z. L. LI, P. Z. HUANG, The Hong Kong Polytechnic University (Hong Kong, P. R. China) 
108 AN ALGEBRA FOR SPATIAL RELATIONS 170 
Z. L. LI, R. L ZHAO, J. CHEN, The Hong Kong Polytechnic University (Hong Kong, P. R. China) 
113 A STUDY ON THE EXTRACTION OF DEM FROM SINGLE SAR IMAGE 178 
M. S. LIAO, J. YANG, H. LIN, Chinese University of Hong Kong (Hong Kong, P. R. China) 
A GIS-BASED ENVIRONMENTAL DECISION SUPPORT SYSTEM FOR THE ERHAI LAKE 
118 WATERSHED MANAGEMENT 183 
L. LIU, G. HUANG, J. LI, University of Regina (Canada) 
ND APPLICATION OF 4D AND ASSOCIATED ENABLING TECHNOLOGIES FOR URBAN DECISION 
123 SUPPORT SYSTEM 190 
7 (Japan) R. LIU, P. G. CHENG, Z. G. XING, K. Y. LU, National Laboratory for Information Engineering in 
Surveying (P. R. China) 
128 
3D RECONSTRUCTION OF A BUILDING FROM SINGLE IMAGE 194 
Y. W. LIU, Z. X. ZHANG, J. Q. ZHANG, Wuhan University (P. R. China) 
) OF 
132 AN INTELLIGENT GIS SEARCH ENGINE TO RETRIEVE INFORMATION FROM INTERNET 199 
Z. LIU, Y. GAO, The University of Calgary (Canada) 
AN ENHANCED TIN GENERATION METHOD FOR USING CONTOUR LINE AS CONSTRAINS 206 
136 W. LU, T. DOIHARA, Asia Air Survey Co., Ltd. (Japan) 
NON-LINEAR RECTIFICATION OF MAP WITH COLLINEAR CONSTRAIN 210 
:S 141 W. LU, T. DOIHARA, Asia Air Survey Co., Ltd. (Japan) 
A STUDY ON VEHICLE POINT CORRECTING ALGORITHM IN GPS/AVL SYSTEMS 214 
H. S. NIU, J. XU, H. LI, College of Electronic Science and Technology (P. R. China) 
145 
ian) A SPATIO-TEMPORAL GEOGRAPHIC INFORMATION SYSTEM BASED ON IMPLICIT TOPOLOGY 
DESCRIPTION: STIMS 218 
Y. OHSAWA, A. NAGASHIMA, Saitama University (Japan)