%0 Journal Article
%T OBJECT-ORIENTED THREE-LEVELED DATA MODEL<br>面向对象的3级数据模型
%A YANG Shuqiang
%A CHEN Huowang
%A WANG Feng
%A <br>杨树强
%A 王峰
%A 陈火旺
%J 软件学报
%D 1997
%I 
%X GIS (geographic infortnation system) data can be divided into three sorts: geometric data, geographic data and graphic data. TLDM proposed in this paper describes these three sorts of data and their relationships with object-oriented model. TLDM is used as the data model of OOGDB implemented.
%K GIS(geographic information system)
%K geographic database
%K object-oriented
%K three-leveled data model<br>GIS（地理信息系统）
%K 地图数据库
%K 面向对象
%K 3级数据模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=7735F413D429542E610B3D6AC0D5EC59&aid=E03F65C92866DE8520B68F20BDAA9EF4&yid=5370399DC954B911&vid=5D311CA918CA9A03&iid=DF92D298D3FF1E6E&sid=42D7028D961473F8&eid=25467A5A28500A25&journal_id=1000-9825&journal_name=软件学报&referenced_num=9&reference_num=17