🟫✂️✅ How to Split and Merge Polygons in QGIS

🔹 PART 1: Split a Polygon

✅ Step 1: Toggle Editing

• Right-click on your polygon layer → Toggle Editing

• Or click the ✏️ Pencil icon

✅ Step 2: Use the Split Features Tool

1. Go to:

   Edit → Split Features
   or click the ✂️ Split Features Tool on the toolbar.

2. Click inside the polygon to start drawing a cut line.

   • Keep clicking to draw vertices.

   • Right-click to finish the split.

3. The polygon will now be split into two separate features.

✅ Step 3: Save Edits

• Click 💾 Save Layer Edits

• Click ✏️ Toggle Editing to stop editing.

🔹 PART 2: Merge (Join) Polygons

✅ Step 1: Toggle Editing

• Right-click the polygon layer → Toggle Editing

✅ Step 2: Select the Polygons to Merge

1. Use the Select Features by Area or Single Click tool.

2. Hold Shift and click to select multiple adjacent polygons.

✅ Step 3: Merge Selected Features

1. Go to:

   Edit → Merge Selected Features
   or right-click on selected area → choose Merge Features

2. A window pops up to decide how attribute values will be handled.

   • Choose what values to keep (e.g., from one polygon or combine)

3. Click OK to complete the merge.

✅ Step 4: Save and Exit

• Click 💾 Save Layer Edits

• Click ✏️ Toggle Editing to stop.

🔍 Notes:

• 🔪 Split is helpful when dividing land parcels, zones, etc.

• 🧩 Merge is used to combine smaller areas into one (e.g., multiple blocks into a neighborhood).