フィーチャーを抽出する

✅ Method 1: Using “Select by Expression”

1. Open your attribute table.
2. Click on “Select Features Using an Expression” (looks like an abacus: ∑).
3. Enter the following expression:
4. SQL（例）:　
   "name" LIKE '%山手線%'
   “code” <= 2000
5. Click “Select Features”.

If you want to export only the selected features:

• Right-click the layer in the Layers panel → Export → Save Selected Features As…