, PolylineZ 
and PolygonZ 
tools extract for each geometry digitized the Z values from the surface selected in the Surface Layer box
and create Z shapes.
If the user digitizes polylines or polygons new vertices are introduced in the digitized geometry depending on the source surface:
- If the source surface is Raster, the user can change the sample distance to control the number of vertices introduced in the digitized shape. To change the sample distance press the "S" key when the tool is active.
- If the source surface is a TIN, new points are inserted at the intersections of the digitized geometry with the edges of the TIN triangles.
The tools can be used to digitize features or graphics
- IN an Editing Session: If the target layer is set to a Z enabled layer of the type the user digitizes, the geometry captured will be stored as a feature in the target layer otherwise it will be stored as a graphic element. If for example the target layer set in the Editor is of PointZ type and the tool used is Digitize PointZ, the geometry will be stored as a feature. If however the tool used is Digitize PolylineZ, the geometry will be stored as a graphic element
- OUT of an Editing Session: the geometries digitized are stored as graphic elements. The default symbols (set in Drawing ==> Default Symbol Properties) are used for the graphic elements.
Copyright © Ianko Tchoukanski