loopstructural

LoopStructural - 3D Geological Modelling

Quick Reference

from LoopStructural import GeologicalModel
from LoopStructural.visualisation import LavaVuModelViewer
import pandas as pd
import numpy as np

# Create model
model = GeologicalModel(origin=[0, 0, -1000], maximum=[10000, 10000, 0])

# Add data
model.data = pd.DataFrame({
    'X': [5000], 'Y': [5000], 'Z': [-500],
    'feature_name': ['strat'], 'val': [0]
})

# Build and visualize
model.create_and_add_foliation('strat', interpolatortype='PLI')
model.update()

viewer = LavaVuModelViewer(model)
viewer.add_isosurface(model['strat'], isovalue=0)
viewer.interactive()

Key Classes

Class	Purpose
GeologicalModel	Main model container - holds features and data
ProcessInputData	Data preparation and validation
StructuralFrame	Coordinate system for fold modelling
FaultSegment	Individual fault surface with displacement

Essential Operations

Build Stratigraphic Model

model = GeologicalModel([0, 0, -1000], [10000, 10000, 0])
model.data = pd.DataFrame({
    'X': [5000, 5000, 5000],
    'Y': [5000, 5000, 5000],
    'Z': [-200, -500, -800],
    'feature_name': ['strat', 'strat', 'strat'],
    'val': [0, 1, 2]  # Different unit values
})
model.create_and_add_foliation('strat', interpolatortype='PLI', nelements=1000)
model.update()

Add Orientation Data

# Structural measurements (strike/dip)
orientations = pd.DataFrame({
    'X': [2000, 5000, 8000],
    'Y': [5000, 5000, 5000],
    'Z': [-100, -100, -100],
    'feature_name': ['strat', 'strat', 'strat'],
    'strike': [90, 90, 90],
    'dip': [30, 30, 30],
    'val': [np.nan, np.nan, np.nan]
})
model.data = pd.concat([interfaces, orientations])

Model with Fault

# Define fault data
fault_data = pd.DataFrame({
    'X': [5000, 5000], 'Y': [2000, 8000], 'Z': [-500, -500],
    'feature_name': ['fault1', 'fault1'],
    'val': [0, 0], 'coord': [0, 0]
})
fault_orient = pd.DataFrame({
    'X': [5000], 'Y': [5000], 'Z': [-500],
    'feature_name': ['fault1'],
    'gx': [1], 'gy': [0], 'gz': [0]  # Fault normal
})

model.data = pd.concat([fault_data, fault_orient, strat_data])
model.create_and_add_fault('fault1', displacement=200)  # Add fault first
model.create_and_add_foliation('strat')  # Stratigraphy affected by fault
model.update()