isPointShape

true when this shape's referencePosition coincides with where the user actually sees the shape (Placemark, Label, sightlines — the reference is the rendered location). false for shapes whose reference is computed from extended geometry and may sit far from where the user grabbed (Polygon centroid, Path centroid, Mesh).

Drag handlers use this to decide between snap-to-cursor (point shapes — the anchor must end up exactly under the cursor) and grab-anchor (extended shapes — the grabbed point of the geometry must stay under the cursor, so the reference moves rigidly along with it).