4.4 SLIDE Vectors Topological Relations
- Binary Topological Relationships
Logical - Return TRUE or False about the spatial relationships between two objects defined by ordered sets of points - (typically points,lines,polygons)
Fig 4.2 graphic discussion view in book code
Symmetrical relationships
function(x, y)
is true,function(y, x)
will also be true,- equals, intersects, crosses, touches and overlaps
When order of x.y is important - not symmetrical
- contains, and within
![](images/relations-1.png)
Fig 4.2 Topological Relations between vector geometries