spatiotemporal-data-library 0.1.0

A Python library for unified access to multi-source spatiotemporal Earth observation data (ERA5, PO.DAAC, SMAP, SFMR, etc.)

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spatiotemporal_data_library

PyPI

To publish:

python -m build
python -m twine upload dist/*

See PyPI project page for more info.

Introduction

spatiotemporal_data_library is a Python library for unified access to multi-source spatiotemporal Earth observation data, supporting major meteorological and oceanographic datasets such as ERA5, PO.DAAC (e.g., CYGNSS, OSCAR), SMAP RSS, and SFMR. Through a unified interface, users can easily search, download, parse, and standardize various remote sensing and reanalysis data.

Installation

It is recommended to use conda or pip to install dependencies:

pip install xarray pandas requests cdsapi netCDF4
# For PO.DAAC support, make sure podaac-data-downloader is installed and .netrc is configured
# For ERA5 support, configure .cdsapirc

Directory Structure

spatiotemporal_data_library/
├── __init__.py
├── fetch.py           # Main entry fetch_data
├── adapters/          # Data source adapters
├── utils.py           # Utility functions
├── config.py          # Configuration
└── test_spatiotemporal_data_library.py  # Test cases

Quick Start

from spatiotemporal_data_library import fetch_data
import datetime

ds = fetch_data(
    dataset_short_name="ECMWF_ERA5",
    variables=["10m_u_component_of_wind", "10m_v_component_of_wind"],
    start_time="2023-01-01T00:00:00Z",
    end_time="2023-01-01T03:00:00Z",
    bbox=[-5, 50, 0, 52]  # [min_lon, min_lat, max_lon, max_lat]
)
print(ds)

API Reference

fetch_data

def fetch_data(dataset_short_name: str,
               variables: list[str],
               start_time: str | datetime.datetime,
               end_time: str | datetime.datetime,
               bbox: list[float] = None,
               point: list[float] = None,
               **kwargs) -> xr.Dataset:

• dataset_short_name: Dataset short name (see table below)
• variables: List of standardized variable names
• start_time/end_time: Query time (ISO string or datetime object)
• bbox: Optional, geographic bounding box [min_lon, min_lat, max_lon, max_lat]
• point: Optional, single point [lon, lat]
• kwargs: Adapter-specific parameters (e.g., pressure_level, storm_name, mission_id, etc.)

Returns: xarray.Dataset, standardized dataset

Supported Datasets and Parameters

Name	dataset_short_name	Example Main Variables	Note
ERA5	ECMWF_ERA5	10m_u_component_of_wind, ...	Requires .cdsapirc
NOAA CYGNSS L2	NOAA_CYGNSS_L2_V1.2	surface_wind_speed, ...	Requires podaac-data-downloader, .netrc
OSCAR V2 FINAL/NRT	OSCAR_V2_FINAL/OSCAR_V2_NRT	zonal_surface_current, ...	Requires podaac-data-downloader, .netrc
SMAP L3 RSS FINAL	SMAP_L3_RSS_FINAL	surface_wind_speed	Requires FTP account
SFMR HRD	SFMR_HRD	surface_wind_speed, rain_rate	Public/Some require mission_id

For detailed variables and parameters, see the source code of each adapter.

Caching Mechanism

• All downloaded raw data files are cached by default in the ~/.spatiotemporal_data_cache directory.
• Files will not be re-downloaded if they already exist.
• You can manually clear this directory to free up space.

Dependencies

• xarray, pandas, requests, cdsapi, netCDF4
• ERA5 requires configuration of ~/.cdsapirc, see CDS API Documentation
• PO.DAAC requires configuration of ~/.netrc, see Earthdata Login
• SMAP RSS requires applying for an FTP account and setting the environment variables RSS_FTP_USER and RSS_FTP_PASSWORD
• SFMR public data does not require authentication, some require mission_id

Testing

pip install pytest
pytest spatiotemporal_data_library/test_spatiotemporal_data_library.py

Contribution & Feedback

Issues, PRs, and suggestions via email are welcome.