Feature

Feature Description

Splits lines or regions using a temporarily drawn polygon.

The Polygon Split button becomes available only when the current map contains editable layers with one or more selected objects.

When multi-layer editing is enabled, the temporary split polygon will divide all selected lines or regions across editable layers that it intersects. These objects may reside in different layers.

Feature Entry

• Features Tab -> Feature Editing Group -> Polygon Split.

Steps

1. Set the target line or region layer to editable in the map.
2. Select the line or region to be split. Alternatively, use box selection or Shift-click to select multiple geometries.
3. In the Features tab's Feature Editing group Gallery control, click the Polygon Split button to activate the operation. The map will enter polygon split mode.
4. Draw a temporary split polygon: Position the cursor on the map and left-click to set the first vertex. Move the cursor to create temporary segments, clicking to place subsequent vertices.
5. Right-click to complete the temporary polygon. The split operation will execute automatically, and the temporary polygon will disappear.
6. Resulting splits: All selected lines or regions in editable layers intersected by the temporary polygon will be divided into separate objects at intersection points.
7. To perform additional splits: Repeat step 4. For new datasets, add data, set its layer editable, then repeat step 4.
8. Cancel polygon split mode by clicking the Polygon Split button again to deactivate it.

Polygon Split Operation Diagram:

Cross-Layer Splitting