From Polygon
From Polygon creates topological items from a Link and Node item structure using a temporary "spaghetti Polygon".
All Polygons in the Link and Node item network which the temporary "spaghetti Polygon" fence overlaps are converted into TopoPolygons.
SIS Desktop 9 always creates the smallest TopoPolygons possible.
- Select From Polygon.
- Construct a "spaghetti Polygon" fence by adding points just as you would when creating a polygon item.
- Click a position on screen; this will be one corner of the "spaghetti Polygon".
- Keep adding positions to define the other corners (there can be as many as you wish)
- Use the Backspace key to remove the last point input if required - you will see the boundary of the "spaghetti Polygon" rubber banding as you move the cursor.
- Press Enter to finish.
The "spaghetti Polygon" fence disappears when the operation is complete.