Snapping
Adjusting vertices to line up within a distance tolerance, often used to clean boundaries before overlay operations.
Category: Operations
Definition (expanded)
Snapping reduces near-miss intersections and tiny gaps. It is useful before union and dissolve. Too much snapping can distort geometry and create new self-intersections.
Related terms
ToleranceA threshold distance used by simplify, snapping, and some repair operations.UnionAn operation that merges overlapping or adjacent polygons into one combined geometry.Valid geometryA geometry that follows topological rules (closed rings, no self-intersections, properly nested holes, etc.).Sliver polygonA very thin polygon artifact produced by overlay operations, snapping, or mismatched boundaries.Coordinate precisionHow many decimal places you keep in coordinates, which affects file size and geometric stability.