GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:421-434 (handler)

  The handler function for the 'get_area' MCP tool. It takes a WKT geometry string, loads it with shapely.wkt.loads, computes the area using geom.area, and returns a dictionary with status, area, and message. Errors are logged and raised.

  @gis_mcp.tool()
  def get_area(geometry: str) -> Dict[str, Any]:
      """Get the area of a geometry."""
      try:
          from shapely import wkt
          geom = wkt.loads(geometry)
          return {
              "status": "success",
              "area": float(geom.area),
              "message": "Area calculated successfully"
          }
      except Exception as e:
          logger.error(f"Error calculating area: {str(e)}")
          raise ValueError(f"Failed to calculate area: {str(e)}")