GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:354-369 (handler)

  The primary handler function for the 'triangulate_geometry' MCP tool. It accepts a WKT geometry string, uses Shapely's triangulate operation to generate triangles, and returns a dictionary with the resulting geometries in WKT format and a success message.

  @gis_mcp.tool()
  def triangulate_geometry(geometry: str) -> Dict[str, Any]:
      """Create a triangulation of a geometry."""
      try:
          from shapely import wkt
          from shapely.ops import triangulate
          geom = wkt.loads(geometry)
          triangles = triangulate(geom)
          return {
              "status": "success",
              "geometries": [tri.wkt for tri in triangles],
              "message": "Triangulation created successfully"
          }
      except Exception as e:
          logger.error(f"Error creating triangulation: {str(e)}")
          raise ValueError(f"Failed to create triangulation: {str(e)}")

• src/gis_mcp/shapely_functions.py:50-59 (registration)

  A resource endpoint that lists 'triangulate_geometry' among available advanced GIS operations, serving as a catalog or indirect registration reference for the tool.

  @gis_mcp.resource("gis://operations/advanced")
  def get_advanced_operations() -> Dict[str, List[str]]:
      """List available advanced operations."""
      return {
          "operations": [
              "triangulate_geometry",
              "voronoi",
              "unary_union_geometries"
          ]
      }