[data models] In ArcMap, a shape that represents a feature’s geometry. Every existing feature on a map has this alternate form, a sketch, that allows visualization of that feature’s composition, with all vertices and segments of the feature visible. When features are edited in ArcMap, the sketch is modified, not the original feature. A sketch must be created in order to create a feature. Only line and polygon sketches can be created, since points have neither vertices nor segments.