symmetric_difference
Calculate the symmetric difference between two geometries to identify areas that belong exclusively to one geometry or the other, excluding overlapping regions.
Instructions
Find symmetric difference between geometries.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| geometry1 | Yes | ||
| geometry2 | Yes |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Implementation Reference
- src/gis_mcp/shapely_functions.py:171-186 (handler)The core handler function for the 'symmetric_difference' tool. It takes two WKT geometry strings, parses them with Shapely, computes the symmetric difference, and returns the result as WKT with status and message.
@gis_mcp.tool() def symmetric_difference(geometry1: str, geometry2: str) -> Dict[str, Any]: """Find symmetric difference between geometries.""" try: from shapely import wkt geom1 = wkt.loads(geometry1) geom2 = wkt.loads(geometry2) result = geom1.symmetric_difference(geom2) return { "status": "success", "geometry": result.wkt, "message": "Symmetric difference created successfully" } except Exception as e: logger.error(f"Error creating symmetric difference: {str(e)}") raise ValueError(f"Failed to create symmetric difference: {str(e)}") - src/gis_mcp/shapely_functions.py:171-171 (registration)The @gis_mcp.tool() decorator registers the symmetric_difference function as an MCP tool.
@gis_mcp.tool() - Resource listing that includes 'symmetric_difference' among basic geometric operations, aiding tool discovery.
@gis_mcp.resource("gis://operations/basic") def get_basic_operations() -> Dict[str, List[str]]: """List available basic geometric operations.""" return { "operations": [ "buffer", "intersection", "union", "difference", "symmetric_difference" ] }