Trimming
Feature Description
The Trimming tool is used to trim shared topological boundaries. By drawing a line that crosses an existing topological edge, you can replace the original boundary. If that boundary involves overlapping topological edges in multiple layers, the relevant layers will update synchronously. This tool is suitable for local modifications of complex line and polygon objects, such as updating dataearth polygons or boundaries based on the latest imagery during remote sensing imagery vectorization.
Feature Entry
- Edit Data tab->Object Editing group->Topology editing drop-down menu->Trimming.
Steps
- Enable the editing state of relevant layers in the Layer Manager, then open Topology edit switches in the Edit Data tab ->ObjectEdit group->Topology editing drop-down menu. Once enabled, the topology map will be overlaid on the map.
- Select one or more topological edges on the map, then in the Edit Data tab ->ObjectEdit group->Topology editing drop-down menu click the Trimming button.
- When the mouse cursor on the map changes to a crosshair and the prompt says: "Draw a line that has at least two or more intersections with the currently selected object." At this point, you can start drawing the curve, right-click to end the drawing, and complete the trimming.
Note:- If multiple topological edges are selected at the same time, the trimming line must have at least two intersections with each selected edge to succeed.
- During trimming, if you need to exclude some shared objects from this trimming, you can uncheck them in the Shared object panel.
Note:- Supports setting the topology edit tolerance. The tolerance refers to the distance between object nodes. Within this distance, edges and nodes are considered coincident and share the same position.
- By default, the system automatically calculates the minimum tolerance based on the data. Generally, it is recommended to use the default value.
- To modify, click the Tolerance Settings button. In the pop-up Topology edit tolerance dialog box, you can manually modify the value. After modification, click the Reset button beside the input box to revert to the default value.
Related Topics