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Clean Dialog:

NOTES: In order to ensure that the attributes are updated appropriately go to THEME/PROPERTIES/EDITING and adjust the values in the Attribute Updating panel before performing any editing. Use CTRL + Z to UNDO last edit Self Intersect Check Control Panel allows the user to select Fast or Full (slow if many features in the current Theme) check for self intersection to be performed.

• Intersect - performs intersection on the whole theme
  • Creates a node in each intersection between two polylines
  • Checks for self intersecting polylines
  • Analyses the resulting nodes
  • Cleans PseudoPseudo Nodes
• Nodes Control Panel
  • Analyses the nodes and draws them on the View. User can control the analyses extent using the radio buttons and  check box
    • dangling node
    • pseudo node
    • regular (normal) node
  • Radio buttons
    • "All" - analyses will be performed for the whole theme. If the theme is big (many records) it can be time consuming
    • "Visible" - analyses will be performed for the visible extent of the View. For polylines which are partially outside of the visible extent the nodes outside of this area will be incorrectly colored. If you zoom out or pan you must analyze again in order to draw the nodes with correct colors.
  • CheckBox - Switches regular nodes On/Off
• Tolerance - Applies to cleaning Dangling nodes (overshoots or undershoots). Can be input in the text box or defined interactively using the tolerance tool (The value of the tolerance will be the diameter of the circle drawn by the user on the View).
• Dangling nodes - Cleans all dangling nodes with the user specified tolerance
  • Overshoots - All the Polylines having a Dangling node with length less than the tolerance will be deleted
  • Undershoots - All the Polylines having a Dangling node and length larger than the tolerance will be processed. Any dangling node will be snapped to the closest node within the tolerance. If the distance from the dangling node to the closest Polyline is smaller than the tolerance, the Polyline will be extended to the intersection with the closest Polyline. The direction of the last(first) segment of  the Polyline will be kept. Intersection (regular node will be formed)
• Pseudo nodes - This process can be called dissolve. A list of all fields will be presented. The user have to select multiple dissolve fields or NONE if he does not want to use one. All the Pseudo nodes will be processed. If the two polylines joining in a Pseudo node have the same value for the dissolve field they will be merged. If option NONE is used all the polylines sharing common Pseudo Node will be merged no matter of attribute values.
• Double lines - Removes duplicate lines from the theme.
  • Fast option -  checks for polylines with the same Start and End nodes. If there are two other identical vertices the polylines are considered duplicates and one of them is removed. It is very good (and fast) for removing duplicate lines for polyline themes created from polygon themes
  • Full option - checks whether all the vertices of a polyline are within distance smaller than the Fuzzy tolerance from another polyline and if so the shorter of the two is removed.
• Close rings - Checks (with user defined tolerance) and closes the polylines which should be closed
• Close - Closes Clean Dialog. Returns to Main Dialog