GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:452-467 (handler)

  The handler function decorated with @gis_mcp.tool() that implements the 'make_valid' tool. It parses WKT geometry, applies Shapely's make_valid to fix invalid geometries, and returns the result as WKT.

  @gis_mcp.tool()
  def make_valid(geometry: str) -> Dict[str, Any]:
      """Make a geometry valid."""
      try:
          from shapely import wkt, make_valid
          geom = wkt.loads(geometry)
          result = make_valid(geom)
          return {
              "status": "success",
              "geometry": result.wkt,
              "message": "Geometry made valid successfully"
          }
      except Exception as e:
          logger.error(f"Error making geometry valid: {str(e)}")
          raise ValueError(f"Failed to make geometry valid: {str(e)}")

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

  Resource listing that includes 'make_valid' among available validation operations, indicating its registration in the MCP toolset.

  @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"
          ]
      }