GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:237-251 (handler)

  The main handler function for the 'get_centroid' tool. It takes a WKT string representing a geometry, uses Shapely to compute its centroid, and returns the centroid geometry as WKT in a structured response dictionary. Errors are logged and raised.

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