GIS vector data for example shapefile contains polygonal data.
Lets assume, we have polygon A which has self-intersection which means that the edges in this polygon intersect with each other.
Lets say if we want to intersect A with polygon B, then the steps of computing the overlaid polygon differs whether A is a polygon with self-intersections or not.
Do the polygons in one map layer have self-intersections or not?
I searched for this question on internet and I found couple of instances where people complain about error caused while importing data due to the presence of self-intersecting polygons.
Also I got the impression that self intersecting polygons are not possible in certain file formats.
أكثر...
Lets assume, we have polygon A which has self-intersection which means that the edges in this polygon intersect with each other.
Lets say if we want to intersect A with polygon B, then the steps of computing the overlaid polygon differs whether A is a polygon with self-intersections or not.
Do the polygons in one map layer have self-intersections or not?
I searched for this question on internet and I found couple of instances where people complain about error caused while importing data due to the presence of self-intersecting polygons.
Also I got the impression that self intersecting polygons are not possible in certain file formats.
أكثر...