Sliver polygon
A very thin polygon artifact produced by overlay operations, snapping, or mismatched boundaries.
Category: Topology
Definition (expanded)
Slivers often show up after union, difference, or dissolve when boundaries are almost aligned but not quite. They can inflate vertex counts and cause messy topology. Fixes include snapping, simplifying, or using a tolerance-based clean step.
Related terms
UnionAn operation that merges overlapping or adjacent polygons into one combined geometry.DifferenceAn operation that subtracts one geometry from another (A minus B).SnappingAdjusting vertices to line up within a distance tolerance, often used to clean boundaries before overlay operations.ToleranceA threshold distance used by simplify, snapping, and some repair operations.SimplifyReduces vertex count while approximating the shape to improve performance and reduce file size.