ISSN 1002-1027  CN 11-2952/G2

Acta scientiarum naturalium Universitatis Pekinensis

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Continuous and Discrete Dynamic Fields Integrated Modeland Its Database Extension

HUANG Fengru, FANG Yu, CHEN Bin1PENG Xia, YIN Shuangshi   

  1. Institute of Remote Sensing & GIS, Peking University, Beijing, 100871; 1 Corresponding Author, E-mail: gischen@pku.edu.cn
  • Received:2006-11-28 Online:2007-11-20 Published:2007-11-20

Abstract: Based on the field model, a uniform dynamic field model is proposed to support representing the characteristics of distribution continuity and time development of spatial phenomena. Through analytical expressions and arrays data structures, data types and operating functions of the new model are extended in an object-relational database to support uniform representation, management, access and spatio-temporal querying for continuous and discrete dynamic fields. Several examples are demonstrated to discuss the representing and querying ability of the new model and its database extension.