entropice/CONTRIBUTING.md

Contributing to Entropice

Thank you for your interest in contributing to Entropice! This document provides guidelines for contributing to the project.

Getting Started

Prerequisites

• Python 3.13
• CUDA 12 compatible GPU (for full functionality)
• Pixi package manager

Setup

pixi install

This will set up the complete environment including RAPIDS, PyTorch, and all geospatial dependencies.

Development Workflow

Code Organization

• src/entropice/: Core modules (grids, data sources, training, inference)
• src/entropice/dashboard/: Streamlit visualization dashboard
• scripts/: Data processing pipeline scripts (numbered 00-05)
• notebooks/: Exploratory analysis and validation notebooks
• tests/: Unit tests

Key Modules

• grids.py: H3/HEALPix spatial grid systems
• darts.py, era5.py, arcticdem.py, alphaearth.py: Data source processors
• dataset.py: Dataset assembly and feature engineering
• training.py: Model training with eSPA/SPARTAn
• inference.py: Prediction generation

Coding Standards

Python Style

• Follow PEP 8 conventions
• Use type hints for function signatures
• Prefer numpy-style docstrings for public functions
• Keep functions focused and modular

Geospatial Best Practices

• Use xarray with XDGGS for gridded data storage
• Store intermediate results as Parquet (tabular) or Zarr (arrays)
• Leverage Dask for lazy evaluation of large datasets
• Use GeoPandas for vector operations
• Use EPSG:3413 (Arctic Stereographic) coordinate reference system (CRS) for any computation on the data and EPSG:4326 (WGS84) for data visualization and compatability with some libraries

Data Pipeline

• Follow the numbered script sequence: 00grids.sh → 01darts.sh → ... → 05train.sh
• Each stage should produce reproducible intermediate outputs
• Document data dependencies in module docstrings
• Use paths.py for consistent path management

Testing

Run tests for specific modules:

pixi run pytest

When adding features, include tests that verify:

• Correct handling of geospatial coordinates and projections
• Proper aggregation to grid cells
• Data integrity through pipeline stages

Submitting Changes

Pull Request Process

1. Branch: Create a feature branch from main
2. Commit: Write clear, descriptive commit messages
3. Test: Verify your changes don't break existing functionality
4. Document: Update relevant docstrings and documentation
5. PR: Submit a pull request with a clear description of changes

Commit Messages

• Use present tense: "Add feature" not "Added feature"
• Reference issues when applicable: "Fix #123: Correct grid aggregation"
• Keep first line under 72 characters

Working with Data

Local Development

• Set FAST_DATA_DIR environment variable for data directory (default: ./data)

Notebooks

• Notebooks in notebooks/ are for exploration and validation, they are not commited to git
• Keep production code in src/entropice/

Dashboard Development

Run the dashboard locally:

pixi run dashboard

Dashboard code is in src/entropice/dashboard/ with modular pages and plotting utilities.

Questions?

For questions about the architecture, see ARCHITECTURE.md. For scientific background, see README.md.