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《Surveying and Mapping of Geology and Mineral Resources》 2006-03
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Design and Implementation of a Symbolic Database in Electronic Topographic Map Based on OOP Technology

XIE Chao,CHEN Yu-fen(School of Surveying and Mapping,Information Engineering University of PLA,Zhengzhou Henan 450052,China)  
This paper analyzes the difference between electronic map and paper map,probes into symbol manufacture function in various current popular software of GIS,and analyzes its merit and shortcoming,and current,and popular software of GIS,and the differentiation between the electronic map and paper map;and analyzes briefly the difference between the electronic map and paper map symbol designing,at the same time,describes the map symbol in detail based on OOP technology,at last introduces the method of the universal symbolic database in the electronic map EmapSymbol which has been implemented.The experiment indicates that,using OOP technology to develop the map symbolic database,the technique is appropriate,the software developed has great encapsulation,easy to maintain and extend, and the symbol drawn meets the manifestation request of the electronics map absolutely.
【CateGory Index】: P28
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