Function: geof:boundary Non-topological Query Functions
Copyright © 2012 Open Geospatial Consortium
23 Extension relation_family, serialization, version, with URI
confgeometry- topology-extension
. The Dimensionally Extended Nine Intersection Model DE-9IM has been used to define
the relation tested by the query functions introduced in this section. Each query function is associated with a defining DE-9IM intersection pattern. Possible pattern values are
-1
empty, ,
1
,
2
,
T
true
=
{ ,
1
,
2
},
F
false
=
{
-1
}, don’t care
=
{
-1
, ,
1
,
2
}. In the following descriptions, the notation
XY
is used denote applying a spatial relation to geometry types
X
and
Y
i.e.,
x
relation
y
where
x
is of type
X
and
y
is of type
Y
. The symbol
P
is used for 0-dimensional geometries e.g. points. The symbol
L
is used for 1- dimensional geometries e.g. lines, and the symbol
A
is used for 2-dimensional geometries e.g. polygons. Consult the Simple Features specification [ISO 19125-1] for
a more detailed description of DE-9IM intersection patterns.