个标准,所以ORACLE没有详细介绍。本人才疏学浅,忘知道的朋友给个提示。作者: blue_stone 时间: 2007-11-18 19:34
是不是空间数据库中的东东?
看过Oracle® Spatial Topology and Network Data Models没? http://download.oracle.com/docs/ ... .102/b14256/toc.htm作者: jianhua_sky 时间: 2007-11-20 09:30
谢谢楼上的朋友
我看过Oracle® Spatial Topology and Network Data Models,但是ORACLE对FACE表的BOUDARY_EDGE_ID字段,NODE表的EDGE_ID字段,
BOUNDARY_EDGE_ID:
ID number of the boundary edge for this
face. The sign of this number (which is
ignored for use as a key) indicates which
orientation is being used for this
boundary component (positive numbers
indicate the left of the edge, and negative
numbers indicate the right of the edge).
EDGE_ID:
ID number (signed) of the edge (if any)
associated with this node.