サマリー
An enumeration for the landmark side.
プロパティ
| プロパティ | 説明 | データ タイプ |
| Both (読み取り専用) | The landmark is located on both sides of the specific edge source. | Integer |
| Left (読み取り専用) | The landmark is located on the left side of the specific edge source. | Integer |
| Right (読み取り専用) | The landmark is located on the right side of the specific edge source. | Integer |