get_length
Calculate geometry length for spatial measurements in GIS analysis. Input a geometry string to get accurate length results.
Instructions
Get the length of a geometry.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| geometry | Yes |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Implementation Reference
- src/gis_mcp/shapely_functions.py:406-419 (handler)The handler function that implements the get_length tool logic, using Shapely to compute the length of a WKT geometry and return it in a standardized dict format. The @gis_mcp.tool() decorator registers it as an MCP tool.
@gis_mcp.tool() def get_length(geometry: str) -> Dict[str, Any]: """Get the length of a geometry.""" try: from shapely import wkt geom = wkt.loads(geometry) return { "status": "success", "length": float(geom.length), "message": "Length calculated successfully" } except Exception as e: logger.error(f"Error calculating length: {str(e)}") raise ValueError(f"Failed to calculate length: {str(e)}") - Resource handler that lists 'get_length' among available measurement operations for discovery.
@gis_mcp.resource("gis://operations/measurements") def get_measurements() -> Dict[str, List[str]]: """List available measurement operations.""" return { "operations": [ "get_length", "get_area" ] }