In this example, we will continue to work with the parcel.shp polygon layer. Here, we will focus on the first gap error listed in the Topology Checker error list that has a featureID of 0. The steps to repair this are as follows:
- Ensure that editing is still toggled on for the parcels layer.
- Double-click on the error in the table so that QGIS will zoom to the area. You will see a small horizontal gap between two parcel polygons, as shown in the following diagram:
- The same editing parameters that were set in Example 2 will be used here.
- Zoom in a bit closer to the problem area.
- Select the parcel to the north using the select feature by the rectangle tool.
- Using the vertex tool, select the lower-left vertex and drag it to snap with the other two parcels and close the gap:
- Verify that the issue has been resolved by clicking on Validate Extent in the Topology Checker panel.
- The remaining gaps can be repaired using steps 1-7.
Toggle off editing for the parcels...