In the blocksworld domain visualization, each object is represented by a specific shape, color, and size to convey its properties and status:

1. **Shapes**:
   - **Rectangle**: Represents blocks. Each block is depicted as a rectangle to symbolize its solid and stackable nature.
   - **Large Rectangle**: Represents the table. It is drawn as a large rectangle at the bottom to signify its role as the foundation supporting all blocks.
   - **Oval**: Represents the hand. The hand is depicted as an oval to differentiate it from the blocks and table, indicating its role in manipulating the blocks.

2. **Colors**:
   - **Green**: Indicates that a block is "clear," meaning no other block is stacked on top of it.
   - **Red**: Indicates that a block is "not clear," meaning it has another block stacked on top of it.
   - **Blue**: Indicates that the hand is "empty," meaning it is not holding any block.
   - **Orange**: (If used) Indicates that the hand is "holding" a block.

3. **Sizes**:
   - **Medium Rectangle**: Used for blocks to show uniformity in size and to make stacking visually clear.
   - **Large Rectangle**: Used for the table to ensure it visually supports all blocks.
   - **Small Oval**: Used for the hand to signify its role as a manipulator rather than a support structure.

4. **Relative Locations**:
   - Blocks are positioned on the table or on top of other blocks to represent their current state in the blocks world.
   - The hand is placed above all blocks to signify its readiness to interact with the blocks.

5. **Text and Labels**:
   - Each block and the hand have text labels indicating their identifier and status, ensuring clarity and understanding of the diagram.
   - Text is placed inside the shapes with high contrast colors to ensure readability.

6. **Legend**:
   - A legend is provided to map colors to statuses, ensuring that viewers can easily interpret the meaning of each color used in the diagram. The legend is placed such that it does not overlap with any objects in the diagram.

This encoding ensures that the diagram is intuitive, with clear visual distinctions between different states and roles of objects in the blocksworld domain.