4.3 Spatial schema (ISO 19107)
151
contains
The Boolean valued operation "contains" returns TRUE if this GM _ Object contains another GM_Object, or a single point given by a coordinate (DirectPosition).
true
false
0·1
0 °
Fig. 4.34. Operation contains
intersects
The Boolean valued operation "intersects" returns TRUE ifthis GM_Object intersects another GM _ Object.
IoD 01
false
0 0 0
Fig. 4.35. Operation intersects
equals
The Boolean valued operation "equals" returns TRUE if this GM _ Object is equal
to another GM_Object.
true
false
col
o
00
Fig. 4.36. Operation equals
Both objects on the left are congruent.
intersection
The "intersection" operation returns the set theoretic intersection of this
GM_Object and the passed GM_Object.