期刊名称：Ovidius University Annals: Economic Sciences Series
电子版ISSN：2393-3127
出版年度：2011
卷号：11
期号：1
语种：English
出版社：Ovidius University Press
摘要：The necessity to attach complex information to these graphic entities as well as the possibility to make descriptive and graphic operation analysis on these items caused the GIS systems to take another direction from the CAD system simplifying the graphic representation of these entities and developing graphic processing functions,the realization of topologies and links between graphic elements and the descriptive information stored in complex relational data bases,with client/server architecture.
关键词：GPS;Geographic Information;data base;transformation of coordinates in stereo 70
