AnchoredSnapper

Category: Geometric Operators

When Snapping Type is End Point Snapping, the following is done:

• Snaps endpoints of features entering via the CANDIDATE port to endpoints of features entering via the ANCHOR port. ANCHOR features are not output.

• Point features can be used as ANCHOR or CANDIDATE features, and CANDIDATE points will be snapped together (or to a linear base feature) as well.

• Area features will not be altered by the transformer.

• The Add Additional Vertex parameter controls how lines are modified when they are snapped. If it is NEVER, then the endpoint of a line is moved when it is snapped and no additional vertex is added. If it is ALWAYS, then the original end point (start point) of the line becomes the second from the end (start) and a new vertex is added to complete the snap. If it is FORWARD_ONLY, then a new vertex is added only when doing so creates an angle greater than 90 degrees with the original line segment. In this case, if adding the vertex would cause a less than 90-degree angle, the old end point is still moved.

When Snapping Type is Vertex Snapping, the following is done:

• Snaps vertices of features entering via the CANDIDATE port to vertices of features entering via the ANCHOR port. ANCHOR features are not output.

• Point features can be used as ANCHOR or CANDIDATE features, and CANDIDATE points will be snapped together (or to a linear ANCHOR feature) as well.

• Area features will be altered by the transformer in this mode.

• The  Add Additional Vertex parameter is ignored.

If Group By attributes are selected, only those features with the same Group By attribute values will be snapped together.

Any feature that undergoes dimensional collapse as a result of being snapped will be logged as "degenerate" and dropped. "Dimensional collapse" refers to a line or area that becomes a point, or an area that becomes a line.

Note: If the Geometry Handling advanced setting is set to “Rich” in the workspace, arcs are snapped as linear features, and ellipses are snapped as polygonal features; otherwise, arcs and ellipses are both snapped as point features located at their respective center points.

Example