Line Topology Processing

Feature Description

Perform topology validation and repair operations on line datasets or network datasets.

Feature Entry

  • Data Tab->Topology Group->Line Topology Processing.

Steps

  1. Click the Line Topology Processing button to open the following dialog:
    2. Figure: "Line Dataset Topology Processing" Dialog
  2. Select the source dataset requiring topology processing, which can be a line dataset or network dataset.
  3. Choose topology error handling options. The available rules include: remove pseudo nodes, redundant vertices, duplicate lines, overshoots; remove long dangles; merge adjacent ends; and intersect arcs. Users can select appropriate rules according to requirements. For detailed explanations of topology processing rules, refer to Topology Processing Rules. During execution, the system will validate topology according to selected rules and correct detected errors.
  4. Click Advanced to open the following settings dialog for configuring non-break lines and tolerance parameters:
    • Intersect Arcs: Configure parameters for non-break lines that won't be split.
      • Non-break Objects: Lines satisfying the filter expression won't be split. Click the "..." button to input SQL expressions in the dialog. See SQL Expression Query.
      • Non-break Locations: Select a point dataset to determine non-break positions by checking if the distance between point features and adjacent lines falls within tolerance.

        If not configured, all lines will undergo intersect arcs operation. When both parameters are set, the system processes the union of specified objects and locations.

    • Tolerance Settings: Configure parameters for short dangle, long dangle, and fuzzy tolerances. These apply to remove overshoots, extend undershoots, and other topology rules requiring node distance checks. Fuzzy tolerance defaults relate to dataset coordinate systems (see Tolerance Specifications). Short/long dangle tolerances default to 100×fuzzy tolerance if not set in dataset properties.
    Note:
    • Unlisted topology errors will be skipped during processing. For comprehensive validation, use Validate Topology.
  5. Click OK to execute topology processing on selected dataset.
    6. Note:
    • This operation modifies source data directly without creating new datasets. A confirmation dialog will appear warning about source data modification. Backup data beforehand if needed.
Note:
  • When performing "remove overshoots" on line data, ensure "intersect arcs" is selected to guarantee correct processing results.

Related Topics

Topology Overview

Topology Preprocessing

Validate Topology

Error Inspector

Construct Polygons

Extract Boundary