1. Add a new vector layer for SEGMENTS of polygon borders (let us call it Cosmetic).
2. Create a database table for this layer containing one user-specified field that may be called LINETYPE.
3. Specify possible values of this field: Solid, Dashed, Dot, etc.
4. Adjust line representation on the Cosmetic layer in accordance with the attribute value.
5. Forget about polygonal layers for a while and just digitize boundaries to the Cosmetic layer and input attributes that correspond to linetypes
(it is easier to do with the help of the Group Editor for a number of selected lines at once).
6. Form polygons out of the lines (segments). To do it, take a Tracer, and:
- switch on the Line Vertices view mode
;
- select manual tracing mode (pulled position of the
button);
- switch on the Autoclose option
;
- now just click pairs of neighboring points on the borders of future polygons - the tracer will do everything else automatically.
After export to your GIS, make polygon boundaries invisible and adjust representation of layers of the Cosmetic layer as it is in Easy Trace.
An experienced and accurate operator may form polygons out of line segments on the Cosmetic layer IN AUTOMATIC MODE .
To do it, apply the Utilities->Topology->Create Polygons
command... |