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1 Geography and Territorial Research Vol. 16 No. 4 Nov. 2000,, ( GIS ) : (Object) ( Field) GIS,,, : ; ; : TP :A : (2000) [1 ] [2 ], ( ) ( ) (, ) ( ) 20, GIS CAD (MM IS) (Join), : ( Field) (Object) O GIS [3 SQL ],, GIS GIS GIS,, 1, SQL,FORTRAN C 6, GIS, (ERDAS Spatial : ; : : ( : ) : ( ),

2 74 16 Modeller), GIS GIS, GIS (Operator),,, 2 GIS,,, : 2. 1, 1 ldd (1) 1 9, ; 5 1 boolean 0 () ;1 () nominal, 0255 ordinal 0255 scalar directional, 02( ) 0360 () ; - 1 ldd (local drain direction) - ( ) 19 ( ),5 3. 2, (2),

3 4 : () 3,, 1,, , 3 GIS, ( ) ; ( ) ; (, ),, (2) ( Map Algebra) [4 ] [5 ] (Cartographic Modelling Language) (timein2 put, timereport) GIS,, Tomlin,,, 2 : G = C 3 Q d 3 sin (S) 3 10 ( - 3) Cover Factor (C),Flow Volume (Q),Slope (S) d = 117 : Transport Capacity = Cover Factor 3 Flow Volume sin (Slope) 3 10E23

4 (3) : GIS GIS, 3, GIS (timeinput,timereport) GIS GIS GIS GIS, ; 5 GIS, ( 96 )

5 96 16 [ 4 ] Xu L, and Ai C. Simple and Effective Phase Unwrapping Technique[J ]. Interferometry IV : Techniques and Analysis, Pro2 ceeding of the SPIE, 1993, Vol. 2003, Society of Photo - Optical Instrumentation Engineers, Bellingham, WA, [ 5 ] Lim H, Xu W, and Huang X. Two New Practical Methods for Phase Unwrapping[ C]. Proceedings of the 1995 Internation2 al Geoscience and Remote Sensing Symposium, Lincoln, NE, May 27-31, 1996, IEEE, Piscataway, NJ, [ 6 ] Flynn T J, Consistent 2 - D Phase Unwrapping Guided by a Quality Map [ C]. Proceeding of the 1996 International Geo2 science and Remote Sensing Symposium, Lincoln, NE, May 27-31, 1996,IEEE, Piscataway, NJ, [ 7 ] Dennis C Ghiglia and Mark D Pritt. Two - Dimensional Phase Unwrapping - Theory, Algorithms, and Software[ M ]. John Wiley & Sons, Inc., [ 8 ] Briggs W L. A Multigrid Tutorial[ M ]. SIAM, Philadephia, [9 ] Ghiglia D C, and Romero L A. Robust Two - Dimensional Weighted and Unweighted Phase Unwrapping That Use Fast Transforms and Iterative Methods[J ]. Journal of the Optical Society of America A, 1994, 11 : On INSAR 2D Phase Un wrapping Algorithm GAO Yong ( Institute of RS & GIS, Beijing U niversity, Beijing , China) Abstract :Two - dimensional p hase unwrapping technology plays a core role in t he application of SAR interferomet ry. The t heories and properties of some main unwrapping algorit hms are ana2 lyzed comparatively wit h detailed experiment. The local operator of pat h - following algorit hm and the global operator of least - square algorithm are the essential characteristics of the two un2 wrapping algorit hms. Each algorit hm has it s own unique suitability to different data, and t he choice of the algorithms is depended on the data used actually. Key words :INSAR, 2D p hase unwrapping ( 76 ) : [ 1 ] Kim W, Garza J, and Kesin A. Spatial Data Management in Database Systems[ C]. Proc. Third Int l Symp Advances in Spatial Databases : 1-13 [ 2 ] M. F. Worboys. Geographic Information Systems : A Computing Perspective[ M ]. Taylor and Francis [ 3 ] Open GIS Consortium, Open GIS Simple Features Specification for SQL, URL : http :/ / www. opengis. org/ public/ abstract. html, [ 4 ] Berry J K.. Fundamental operations in computer - assisted map analysis [J ]. International Journal of Geographic Information Systems. 1987,1 (2) : [ 5 ] Tomlin C D. Geographic information systems and cartographic modelling [ M ]. Englewood Cliffs, Prentice Hall Model of Field - based Spatial Dynamic Data and Design of Spatial Dynamic Model ing Language WU lun,ma Xiu2jun, TIAN Yuan ( Institute of Remote Sensing & GIS, Beijing U niversity, Beijing , China) Abstract :Current st udy on Spatial Database Management Systems is mainly focused on object - based spatial data model. However, existing and emerging applications require new f unctionalities to support field - based data, especially considering t he need of spatial dynamic simulation. The objective of this paper is to design a spatial dynamic modeling language, which can be embedded in the GIS so as to provide the support to simulate complex space - time processes for database management and algorit hm optimization. The language can also provide a clear logic diagram for building a spatial dynamic model and a quantitative and simulated tool for management of nat ural resources, environmental and ecological application. Key words : spatial database ; data model ; spatial dynamic model ; model language

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