The Tunnel segments operation reduces the amount of intermediate points within segments in a segment map. The segments of the input map are copied into a new segment map. However, for every three consecutive intermediate points within a segment, the middle one is omitted if it falls within a user-defined tunnel-width. Redundant nodes can also be removed.
Dialog box options:
Input segment map: |
Select an input segment map. Open the list box and select the desired input map, or drag a segment map directly from the Catalog into this box. No special input map requirements. |
Tunnel width: |
Type a value for the tunnel width in meters (real value >= 0). If a tunnel width of 0 is specified, no tunnelling is performed. For more information, see also Tunnel segments : functionality. |
Remove superfluous nodes: |
Select this check box if you want to remove superfluous nodes from the segment map (recommended). Clear this check box if you want all existing nodes to remain. |
Output segment map: |
Type a name for the output segment map that will contain the copied 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.
See also: