请教空间关系定义.

<P>在看openGIS的simple feature for SQL 中有</P>
<P>Disjoint(anotherGeometry:Geometry):Integer— Returns 1 (TRUE) if this Geometry is ‘spatially disjoint’from anotherGeometry.<BR>Intersects(anotherGeometry:Geometry):Integer— Returns 1 (TRUE) if this Geometry ‘spatially intersects’anotherGeometry.<BR>Touches(anotherGeometry:Geometry):Integer— Returns 1 (TRUE) if this Geometry ‘spatially touches’anotherGeometry.<BR>Crosses(anotherGeometry:Geometry):Integer— Returns 1 (TRUE) if this Geometry ‘spatially crosses’anotherGeometry.<BR>Within(anotherGeometry:Geometry):Integer — Returns 1 (TRUE) if this Geometry is ‘spatially within’anotherGeometry.<BR>Contains(anotherGeometry:Geometry):Integer — Returns 1 (TRUE) if this Geometry ‘spatially contains’ anotherGeometry.<BR>Overlaps(anotherGeometry:Geometry):Integer — Returns 1 (TRUE) if this Geometry ‘spatially overlaps’anotherGeometry.</P>
<P>等操作,这些操作由9交模型定义</P>
<P>Interior Boundary Exterior<BR>Interior dim(I(a)<FONT face=宋体 size=3>∩</FONT>(b)) dim(I(a)<FONT face=宋体 size=3>∩</FONT>B(b)) dim(I(a)<FONT face=宋体 size=3>∩</FONT>E(b))<BR>Boundary dim(B(a)<FONT face=宋体 size=3>∩</FONT>I(b)) dim(B(a)<FONT face=宋体 size=3>∩</FONT>B(b)) dim(B(a)<FONT face=宋体 size=3>∩</FONT>E(b))<BR>Exterior dim(E(a)<FONT face=宋体 size=3>∩</FONT>I(b)) dim(E(a)<FONT face=宋体 size=3>∩</FONT>B(b)) dim(E(a)<FONT face=宋体 size=3>∩</FONT>E(b))</P>
<P>我想请教一下Interior, boundary 和dim 的具体定义,我在很多地方都没查到.</P>
<P>请大牛们指教!</P>