GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:468-483 (handler)

  The handler function for the 'simplify' tool. It takes a WKT geometry string and tolerance, simplifies the geometry using Shapely's simplify method, and returns the result as WKT.

  @gis_mcp.tool()
  def simplify(geometry: str, tolerance: float, 
              preserve_topology: bool = True) -> Dict[str, Any]:
      """Simplify a geometry."""
      try:
          from shapely import wkt
          geom = wkt.loads(geometry)
          result = geom.simplify(tolerance=tolerance, preserve_topology=preserve_topology)
          return {
              "status": "success",
              "geometry": result.wkt,
              "message": "Geometry simplified successfully"
          }
      except Exception as e:
          logger.error(f"Error simplifying geometry: {str(e)}")
          raise ValueError(f"Failed to simplify geometry: {str(e)}")

• src/gis_mcp/shapely_functions.py:71-80 (registration)

  Resource listing that includes 'simplify' as an available validation operation, aiding in tool discovery.

  @gis_mcp.resource("gis://operations/validation")
  def get_validation_operations() -> Dict[str, List[str]]:
      """List available validation operations."""
      return {
          "operations": [
              "is_valid",
              "make_valid",
              "simplify"
          ]
      }

• src/gis_mcp/shapely_functions.py:469-470 (schema)

  Function signature defining the input schema (geometry: str, tolerance: float, preserve_topology: bool=True) and output (Dict[str, Any]).

  def simplify(geometry: str, tolerance: float, 
              preserve_topology: bool = True) -> Dict[str, Any]: