GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:559-580 (handler)

  The handler function for the 'geometry_to_geojson' tool. Converts a WKT geometry string to GeoJSON using Shapely's mapping function.

  @gis_mcp.tool()
  def geometry_to_geojson(geometry: str) -> Dict[str, Any]:
      """
      Convert a Shapely geometry (WKT) to GeoJSON using shapely.geometry.mapping.
      Args:
          geometry: WKT string of the geometry.
      Returns:
          Dictionary with status, message, and GeoJSON representation.
      """
      try:
          from shapely import wkt
          from shapely.geometry import mapping
          geom = wkt.loads(geometry)
          geojson = mapping(geom)
          return {
              "status": "success",
              "geojson": geojson,
              "message": "Geometry converted to GeoJSON successfully"
          }
      except Exception as e:
          logger.error(f"Error in geometry_to_geojson: {str(e)}")
          return {"status": "error", "message": str(e)}

• src/gis_mcp/shapely_functions.py:82-93 (registration)

  Resource handler that lists 'geometry_to_geojson' as an available Shapely utility operation.

  @gis_mcp.resource("gis://operations/shapely_util")
  def get_shapely_util_operations() -> Dict[str, List[str]]:
      """List available Shapely utility/advanced operations."""
      return {
          "operations": [
              "snap_geometry",
              "nearest_point_on_geometry",
              "normalize_geometry",
              "geometry_to_geojson",
              "geojson_to_geometry"
          ]
      }