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Aligner Tool

Overview​

The Align Tool in QGIS is a feature that allows users to align and scale vector features based on selected reference points. This tool is useful for correcting spatial misalignments and ensuring accurate positioning of features within a map.

Key Features​

  • Align Features: Adjusts the position of a selected feature to match reference points.
  • Scale Features: Allows resizing of a feature based on two selected points.
  • Snapping Support: Ensures precision by snapping to existing vertices within the layer.
  • Visual Feedback: Displays visual guides to help users select points and verify alignment before applying changes.

How to Use the Align Tool​

Step 1: Activating the Tool​

  1. Open your QGIS project and select a vector layer that contains line or polygon features.
  2. Activate the Align Tool from the toolbar or plugin menu.

Step 2: Selecting Reference Points​

  1. Click on the first source point in the area that needs alignment.
  2. Click on the corresponding target vertex in the feature that needs to be adjusted.
  3. Select the second source point to define the alignment direction.
  4. Click on the second target vertex in the feature.

Step 3: Choosing an Alignment Option​

After selecting the points, a prompt will appear with two options:

  • Align Only: Moves the feature to match the selected reference points.
  • Scale & Align: Adjusts both position and size of the feature to fit the reference points.

Choose the appropriate option based on your requirement.

Step 4: Applying the Changes​

  1. The feature will be adjusted according to your selection.
  2. Review the alignment visually on the map.
  3. Save the changes to finalize the adjustments.

Additional Information​

  • The tool provides dashed lines and highlighted points to guide selections.
  • Ensure snapping is enabled in the project settings for improved accuracy.
  • If an incorrect point is selected, restart the selection process to adjust accordingly.

This tool enhances spatial accuracy in QGIS projects, making it easier to adjust and align features effectively.