ifc-data-extraction

name	ifc-data-extraction
description	Extract structured data from IFC (Industry Foundation Classes) files using IfcOpenShell. Parse BIM models, extract quantities, properties, spatial relationships, and export to various formats.

IFC Data Extraction

Overview

This skill provides comprehensive IFC file parsing and data extraction using IfcOpenShell. Extract element data, quantities, properties, and relationships from BIM models for analysis and reporting.

Based on Open BIM Standards - Working with vendor-neutral IFC format for maximum interoperability.

"IFC является открытым стандартом для обмена BIM-данными, позволяющим извлекать информацию независимо от программного обеспечения." — DDC Methodology

Quick Start

import ifcopenshell
import ifcopenshell.util.element as element_util
import pandas as pd

# Open IFC file
ifc = ifcopenshell.open("model.ifc")

# Get project info
project = ifc.by_type("IfcProject")[0]
print(f"Project: {project.Name}")

# Extract all walls
walls = ifc.by_type("IfcWall")
print(f"Total walls: {len(walls)}")

# Get wall data
wall_data = []
for wall in walls:
    psets = element_util.get_psets(wall)
    wall_data.append({
        'GlobalId': wall.GlobalId,
        'Name': wall.Name,
        'Type': wall.is_a(),
        'Level': get_level(wall),
        'Properties': psets
    })

df = pd.DataFrame(wall_data)
print(df.head())

Core Extraction Functions

Element Extractor Class

import ifcopenshell
import ifcopenshell.util.element as element_util
import ifcopenshell.util.placement as placement_util
import ifcopenshell.geom
import pandas as pd
from typing import List, Dict, Optional, Any

class IFCExtractor:
    """Extract data from IFC files"""

    def __init__(self, ifc_path: str):
        self.model = ifcopenshell.open(ifc_path)
        self.settings = ifcopenshell.geom.settings()

    def get_project_info(self) -> Dict:
        """Extract project metadata"""
        project = self.model.by_type("IfcProject")[0]
        site = self.model.by_type("IfcSite")
        building = self.model.by_type("IfcBuilding")

        return {
            'project_id': project.GlobalId,
            'project_name': project.Name,
            'description': project.Description,
            'site_count': len(site),
            'building_count': len(building),
            'schema': self.model.schema
        }

     () -> pd.DataFrame:
        
         element_types  :
            element_types = [
                , , , ,
                , , , 
            ]

        all_elements = []

         ifc_type  element_types:
            elements = .model.by_type(ifc_type)

             elem  elements:
                data = ._extract_element_data(elem)
                data[] = ifc_type
                all_elements.append(data)

         pd.DataFrame(all_elements)

     () -> :
        
        
        data = {
            : element.GlobalId,
            : element.Name,
            : element.Description,
            : element.ObjectType  (element, )  
        }

        
        data[] = ._get_element_level(element)

        
        data[] = ._get_element_material(element)

        
        data[] = ._get_element_type(element)

        
        psets = element_util.get_psets(element)
        data[] = psets

        
        base_quantities = psets.get(, {})
        data.update({
            : base_quantities.get(),
            : base_quantities.get(),
            : base_quantities.get(),
            : base_quantities.get()  base_quantities.get(),
            : base_quantities.get()  base_quantities.get()
        })

         data

     () -> []:
        
         (element, ):
             rel  element.ContainedInStructure  []:
                 rel.RelatingStructure.is_a():
                     rel.RelatingStructure.Name
         

     () -> []:
        
         (element, ):
             rel  element.HasAssociations  []:
                 rel.is_a():
                    material = rel.RelatingMaterial
                     (material, ):
                         material.Name
                     (material, ):
                        layers = material.ForLayerSet.MaterialLayers
                         layers:
                             layers[].Material.Name
         

     () -> []:
        
         (element, ):
             rel  element.IsTypedBy  []:
                 rel.RelatingType.Name
         

     () -> pd.DataFrame:
        
        elements = .get_all_elements()

        
        quantities = elements.groupby([, ]).agg({
            : ,
            : ,
            : ,
            : 
        }).rename(columns={: }).reset_index()

         quantities

     () -> pd.DataFrame:
        
        storeys = .model.by_type()

        level_data = []
         storey  storeys:
            level_data.append({
                : storey.GlobalId,
                : storey.Name,
                : storey.Elevation,
                : storey.Description
            })

         pd.DataFrame(level_data).sort_values()

     () -> pd.DataFrame:
        
        spaces = .model.by_type()

        space_data = []
         space  spaces:
            psets = element_util.get_psets(space)
            base_qty = psets.get(, {})

            space_data.append({
                : space.GlobalId,
                : space.Name,
                : space.LongName,
                : ._get_element_level(space),
                : base_qty.get(),
                : base_qty.get(),
                : base_qty.get()
            })

         pd.DataFrame(space_data)

     () -> pd.DataFrame:
        
        materials = {}

         elem  .model.by_type():
            material = ._get_element_material(elem)
             material:
                 material   materials:
                    materials[material] = {: , : }

                materials[material][] += 

                psets = element_util.get_psets(elem)
                volume = psets.get(, {}).get(, )
                 volume:
                    materials[material][] += volume

         pd.DataFrame.from_dict(materials, orient=).reset_index()

     () -> pd.DataFrame:
        
        relationships = []

        
         rel  .model.by_type():
             elem  rel.RelatedElements:
                relationships.append({
                    : elem.GlobalId,
                    : elem.is_a(),
                    : ,
                    : rel.RelatingStructure.GlobalId,
                    : rel.RelatingStructure.is_a()
                })

        
         rel  .model.by_type():
             part  rel.RelatedObjects:
                relationships.append({
                    : part.GlobalId,
                    : part.is_a(),
                    : ,
                    : rel.RelatingObject.GlobalId,
                    : rel.RelatingObject.is_a()
                })

         pd.DataFrame(relationships)

Geometry Extraction

Extract Geometry Data

import numpy as np

class IFCGeometryExtractor:
    """Extract geometry data from IFC elements"""

    def __init__(self, ifc_path: str):
        self.model = ifcopenshell.open(ifc_path)
        self.settings = ifcopenshell.geom.settings()
        self.settings.set(self.settings.USE_WORLD_COORDS, True)

    def get_element_geometry(self, element) -> Dict:
        """Extract geometry for single element"""
        try:
            shape = ifcopenshell.geom.create_shape(self.settings, element)

            verts = shape.geometry.verts
            faces = shape.geometry.faces

            # Calculate bounding box
            vertices = np.array(verts).reshape(-1, 3)
            min_coords = vertices.min(axis=0)
            max_coords = vertices.max(axis=0)
            dimensions = max_coords - min_coords

            return {
                'GlobalId': element.GlobalId,
                'vertices_count': len(vertices),
                'faces_count': len(faces) // 3,
                'min_x': min_coords[0],
                'min_y': min_coords[1],
                'min_z': min_coords[],
                : max_coords[],
                : max_coords[],
                : max_coords[],
                : dimensions[],
                : dimensions[],
                : dimensions[],
                : (min_coords[] + max_coords[]) / ,
                : (min_coords[] + max_coords[]) / ,
                : (min_coords[] + max_coords[]) / 
            }
        :
             {: element.GlobalId, : }

     () -> pd.DataFrame:
        
        elements = .model.by_type(element_type)
        boxes = [.get_element_geometry(e)  e  elements]
         pd.DataFrame(boxes)

     () -> pd.DataFrame:
        
        elements = .model.by_type(element_type)
        volumes = []

         elem  elements:
            :
                shape = ifcopenshell.geom.create_shape(.settings, elem)
                
                verts = np.array(shape.geometry.verts).reshape(-, )
                bbox_volume = np.prod(verts.(axis=) - verts.(axis=))

                volumes.append({
                    : elem.GlobalId,
                    : elem.Name,
                    : bbox_volume
                })
            :
                

         pd.DataFrame(volumes)

Export Functions

Export to Various Formats

class IFCExporter:
    """Export IFC data to various formats"""

    def __init__(self, extractor: IFCExtractor):
        self.extractor = extractor

    def to_excel(self, output_path: str, include_all: bool = True):
        """Export to Excel with multiple sheets"""
        with pd.ExcelWriter(output_path, engine='openpyxl') as writer:
            # Project info
            project_info = pd.DataFrame([self.extractor.get_project_info()])
            project_info.to_excel(writer, sheet_name='Project', index=False)

            # All elements
            if include_all:
                elements = self.extractor.get_all_elements()
                elements.to_excel(writer, sheet_name='Elements', index=False)

            # Quantities
            quantities = self.extractor.extract_quantities()
            quantities.to_excel(writer, sheet_name='Quantities', index=False)

            # Levels
            levels = self.extractor.extract_levels()
            levels.to_excel(writer, sheet_name='Levels', index=False)

            # Spaces
            spaces = self.extractor.extract_spaces()
            spaces.to_excel(writer, sheet_name='Spaces', index=False)

            # Materials
            materials = .extractor.extract_materials()
            materials.to_excel(writer, sheet_name=, index=)

         output_path

     ():
        
         os
        os.makedirs(output_dir, exist_ok=)

        exports = {
            : .extractor.get_all_elements(),
            : .extractor.extract_quantities(),
            : .extractor.extract_levels(),
            : .extractor.extract_spaces(),
            : .extractor.extract_materials()
        }

         filename, df  exports.items():
            df.to_csv(os.path.join(output_dir, filename), index=)

         output_dir

     ():
        
         json

        data = {
            : .extractor.get_project_info(),
            : .extractor.get_all_elements().to_dict(),
            : .extractor.extract_quantities().to_dict(),
            : .extractor.extract_levels().to_dict(),
            : .extractor.extract_materials().to_dict()
        }

         (output_path, , encoding=)  f:
            json.dump(data, f, indent=, default=)

         output_path

     ():
        
         sqlalchemy  create_engine

        engine = create_engine(connection_string)

        tables = {
            : .extractor.get_all_elements(),
            : .extractor.extract_quantities(),
            : .extractor.extract_levels(),
            : .extractor.extract_spaces(),
            : .extractor.extract_materials()
        }

         table_name, df  tables.items():
            
            simple_df = df.select_dtypes(exclude=[]).copy()
             col  df.columns:
                 df[col].dtype == :
                    simple_df[col] = df[col].astype()

            simple_df.to_sql(table_name, engine, if_exists=, index=)

         (tables.keys())

Quick Reference

Element Type	Common Properties	Quantities
IfcWall	IsExternal, FireRating	Length, Height, Area, Volume
IfcSlab	IsExternal, LoadBearing	Area, Volume, Perimeter
IfcColumn	LoadBearing	Height, CrossSectionArea
IfcBeam	LoadBearing	Length, CrossSectionArea
IfcDoor	FireRating, AcousticRating	Width, Height
IfcWindow	ThermalTransmittance	Width, Height, Area

Property Set Lookup

# Common IFC Property Sets
PSETS = {
    'Pset_WallCommon': ['IsExternal', 'LoadBearing', 'FireRating'],
    'Pset_SlabCommon': ['IsExternal', 'LoadBearing', 'AcousticRating'],
    'Pset_ColumnCommon': ['IsExternal', 'LoadBearing'],
    'Pset_BeamCommon': ['LoadBearing', 'FireRating'],
    'Pset_DoorCommon': ['FireRating', 'AcousticRating', 'SecurityRating'],
    'Pset_WindowCommon': ['ThermalTransmittance', 'GlazingType'],
    'BaseQuantities': ['Length', 'Width', 'Height', 'Area', 'Volume']
}

Resources

• IfcOpenShell: https://ifcopenshell.org
• IFC Standard: https://www.buildingsmart.org/standards/bsi-standards/industry-foundation-classes/
• DDC Website: https://datadrivenconstruction.io

Next Steps

• See bim-validation-pipeline for validating extracted data
• See qto-report for quantity take-off reports
• See 4d-simulation for linking to schedules