parq-blockmodel
Overview
A Python package for efficient storage, manipulation, and analysis of mining block models using Parquet files. parq-blockmodel provides tools for reading, writing, indexing, and transforming large-scale block model datasets, leveraging the performance of Apache Arrow and Parquet for scalable geoscience data workflows.
Installation
Install the base package from PyPI:
pip install parq-blockmodel
Install the optional schema validation support when you want to validate block model attributes with Pandera schemas or load schema definitions from YAML:
pip install "parq-blockmodel[schema]"
Install the visualization extras when you want to use the Trame viewer:
pip install "parq-blockmodel[viz]"
Schema validation
ParquetBlockModel accepts an optional schema= argument on its main
constructors. You can pass either a Pandera DataFrameSchema object or a path
to a YAML schema file, then validate the resulting model in chunks:
from pathlib import Path
from parq_blockmodel import ParquetBlockModel
pbm = ParquetBlockModel.from_parquet(
Path("path/to/blockmodel.parquet"),
schema=Path("schemas/blockmodel.schema.yaml"),
)
pbm.validate()
pbm.validate(sample_chunks=1) # quick spot-check for large models
See the User Guide for detailed documentation on calculated attributes, including custom lookups and functions.
Visualization
The block-model plotting path now delegates through parq_blockmodel.visualization, which keeps the
rendering logic isolated from ParquetBlockModel itself.
from parq_blockmodel import ParquetBlockModel
from parq_blockmodel.visualization import BlockModelTrameApp, TrameBlockModelPlotEngine
pbm = ParquetBlockModel.from_parquet("orebody.parquet")
plotter = pbm.plot(scalar="grade", z_up_lock=True, z_up_hotkey="z")
# Optional terrain context for the PyVista engine:
# - elevation_raster adds a DEM surface
# - imagery_raster textures the DEM when both rasters align
plotter = pbm.plot(
scalar="grade",
elevation_raster="dem.tif",
imagery_raster="imagery.tif",
)
trame_app_from_plot = pbm.plot(
scalar="grade",
engine=TrameBlockModelPlotEngine(),
z_up_lock=True,
z_up_hotkey="z",
)
app = BlockModelTrameApp(pbm, scalar="grade", z_up_lock=True, z_up_hotkey="z")
With z_up_lock=True, hold z for turntable-style orbit (yaw/pitch, no roll) with camera up aligned to +Z.
Geometry operations
parq-blockmodel supports three geometry flagging workflows:
- Polygon flagging for 2D XY regions.
- Surface encoding for 2.5D elevation surfaces (
z = f(x, y)). - Solid flagging for closed 3D volumes.
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