The Polygons to segments operation extracts polygon boundaries and creates a segment map out of them. A mask can be specified to extract segments of specific polygons.
Dialog box options:
Input polygon map: |
Select an input polygon map. Open the list box and select the desired input map, or drag a polygon map directly from the Catalog into this box. No special input map requirements. |
Mask: |
Type (multiple) search strings to extract segments of specific polygons. For more information, see Mask Polygons : functionality and How to use masks. |
Single name: |
Select this check box if you want to assign the single name 'Boundary' to all extracted segments. Clear this check box to assign unique names ('Boundary 1', 'Boundary 2', etc.) to the extracted segments; the original polygon names on either side of a boundary will be stored in the attribute table of the output map. |
Output segment map: |
Type a name for the output segment map that will contain the extracted segments. |
Description: |
Optionally, type a description for the output map. The description will appear in the status bar of the Main window when moving the mouse pointer over the map in a Catalog, and in the title bar of a map window when the output map is displayed. If no description is supplied, the output map will use its own definition as description. |
When you click the Show button, the dependent output map will be defined, calculated and shown. When you click the Define button, the dependent output map will only be defined; if necessary, the map will be calculated later, for instance when the map is opened to be displayed.
When you wish to obtain Unique names for extracted segments, an attribute table will be automatically created for the output map (same name as output map). The table will contain the names of the polygons to the right and to the left of an extracted segment and the length of each extracted segment. Both the map and the attribute table will then use a UniqueID domain.
The unique names or the single name for the output segments are always stored by the output map (internal domain).
See also: