GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/pyproj_functions.py:64-84 (handler)

  The handler function for the 'project_geometry' MCP tool. It takes a WKT geometry string and CRS identifiers, projects the geometry using pyproj Transformer and shapely.transform, and returns the projected WKT geometry.
  @gis_mcp.tool() def project_geometry(geometry: str, source_crs: str, target_crs: str) -> Dict[str, Any]: """Project a geometry between CRS.""" try: from shapely import wkt from shapely.ops import transform from pyproj import Transformer geom = wkt.loads(geometry) transformer = Transformer.from_crs(source_crs, target_crs, always_xy=True) projected = transform(transformer.transform, geom) return { "status": "success", "geometry": projected.wkt, "source_crs": source_crs, "target_crs": target_crs, "message": "Geometry projected successfully" } except Exception as e: logger.error(f"Error projecting geometry: {str(e)}") raise ValueError(f"Failed to project geometry: {str(e)}")
• src/gis_mcp/pyproj_functions.py:9-17 (registration)

  Resource listing that registers 'project_geometry' as an available CRS transformation operation under the 'gis://crs/transformations' resource.
  @gis_mcp.resource("gis://crs/transformations") def get_crs_transformations() -> Dict[str, List[str]]: """List available CRS transformation operations.""" return { "operations": [ "transform_coordinates", "project_geometry" ] }