Source code for torchgeo.datasets.sustainbench_crop_yield
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.
"""SustainBench Crop Yield dataset."""
import os
from typing import Any, Callable, Optional
import matplotlib.pyplot as plt
import numpy as np
import torch
from matplotlib.figure import Figure
from torch import Tensor
from .geo import NonGeoDataset
from .utils import download_url, extract_archive
[docs]class SustainBenchCropYield(NonGeoDataset):
"""SustainBench Crop Yield Dataset.
This dataset contains MODIS band histograms and soybean yield
estimates for selected counties in the USA, Argentina and Brazil.
The dataset is part of the
`SustainBench <https://sustainlab-group.github.io/sustainbench/docs/datasets/sdg2/crop_yield.html>`_
datasets for tackling the UN Sustainable Development Goals (SDGs).
Dataset Format:
* .npz files of stacked samples
Dataset Features:
* input histogram of 7 surface reflectance and 2 surface temperature
bands from MODIS pixel values in 32 ranges across 32 timesteps
resulting in 32x32x9 input images
* regression target value of soybean yield in metric tonnes per
harvested hectare
If you use this dataset in your research, please cite:
* https://doi.org/10.1145/3209811.3212707
* https://doi.org/10.1609/aaai.v31i1.11172
.. versionadded:: 0.5
""" # noqa: E501
valid_countries = ["usa", "brazil", "argentina"]
md5 = "362bad07b51a1264172b8376b39d1fc9"
url = "https://drive.google.com/file/d/1lhbmICpmNuOBlaErywgiD6i9nHuhuv0A/view?usp=drive_link" # noqa: E501
dir = "soybeans"
valid_splits = ["train", "dev", "test"]
[docs] def __init__(
self,
root: str = "data",
split: str = "train",
countries: list[str] = ["usa"],
transforms: Optional[Callable[[dict[str, Any]], dict[str, Any]]] = None,
download: bool = False,
checksum: bool = False,
) -> None:
"""Initialize a new Dataset instance.
Args:
root: root directory where dataset can be found
split: one of "train", "dev", or "test"
countries: which countries to include in the dataset
transforms: a function/transform that takes an input sample
and returns a transformed version
download: if True, download dataset and store it in the root directory
checksum: if True, check the MD5 after downloading files (may be slow)
Raises:
AssertionError: if ``countries`` contains invalid countries or if ``split``
is invalid
RuntimeError: if ``download=False`` but dataset is missing or checksum fails
"""
assert set(countries).issubset(
self.valid_countries
), f"Please choose a subset of these valid countried: {self.valid_countries}."
self.countries = countries
assert (
split in self.valid_splits
), f"Pleas choose one of these valid data splits {self.valid_splits}."
self.split = split
self.root = root
self.transforms = transforms
self.download = download
self.checksum = checksum
self._verify()
self.images = []
self.features = []
for country in self.countries:
image_file_path = os.path.join(
self.root, self.dir, country, f"{self.split}_hists.npz"
)
target_file_path = image_file_path.replace("_hists", "_yields")
years_file_path = image_file_path.replace("_hists", "_years")
ndvi_file_path = image_file_path.replace("_hists", "_ndvi")
npz_file = np.load(image_file_path)["data"]
target_npz_file = np.load(target_file_path)["data"]
year_npz_file = np.load(years_file_path)["data"]
ndvi_npz_file = np.load(ndvi_file_path)["data"]
num_data_points = npz_file.shape[0]
for idx in range(num_data_points):
sample = npz_file[idx]
sample = torch.from_numpy(sample).permute(2, 0, 1).to(torch.float32)
self.images.append(sample)
target = target_npz_file[idx]
year = year_npz_file[idx]
ndvi = ndvi_npz_file[idx]
features = {
"label": torch.tensor(target).to(torch.float32),
"year": torch.tensor(int(year)),
"ndvi": torch.from_numpy(ndvi).to(dtype=torch.float32),
}
self.features.append(features)
[docs] def __len__(self) -> int:
"""Return the number of data points in the dataset.
Returns:
length of the dataset
"""
return len(self.images)
[docs] def __getitem__(self, index: int) -> dict[str, Tensor]:
"""Return an index within the dataset.
Args:
index: index to return
Returns:
data and label at that index
"""
sample: dict[str, Tensor] = {"image": self.images[index]}
sample.update(self.features[index])
if self.transforms is not None:
sample = self.transforms(sample)
return sample
def _verify(self) -> None:
"""Verify the integrity of the dataset.
Raises:
RuntimeError: if ``download=False`` but dataset is missing or checksum fails
"""
# Check if the extracted files already exist
pathname = os.path.join(self.root, self.dir)
if os.path.exists(pathname):
return
# Check if the zip files have already been downloaded
pathname = os.path.join(self.root, self.dir) + ".zip"
if os.path.exists(pathname):
self._extract()
return
# Check if the user requested to download the dataset
if not self.download:
raise RuntimeError(
f"Dataset not found in `root={self.root}` and `download=False`, "
"either specify a different `root` directory or use `download=True` "
"to automatically download the dataset."
)
# Download the dataset
self._download()
self._extract()
def _download(self) -> None:
"""Download the dataset and extract it.
Raises:
RuntimeError: if download doesn't work correctly or checksums don't match
"""
download_url(
self.url,
self.root,
filename=self.dir + ".zip",
md5=self.md5 if self.checksum else None,
)
self._extract()
def _extract(self) -> None:
"""Extract the dataset."""
zipfile_path = os.path.join(self.root, self.dir) + ".zip"
extract_archive(zipfile_path, self.root)
[docs] def plot(
self,
sample: dict[str, Any],
band_idx: int = 0,
show_titles: bool = True,
suptitle: Optional[str] = None,
) -> Figure:
"""Plot a sample from the dataset.
Args:
sample: a sample return by :meth:`__getitem__`
band_idx: which of the nine histograms to index
show_titles: flag indicating whether to show titles above each panel
suptitle: optional suptitle to use for figure
Returns:
a matplotlib Figure with the rendered sample
"""
image, label = sample["image"], sample["label"].item()
showing_predictions = "prediction" in sample
if showing_predictions:
prediction = sample["prediction"].item()
fig, ax = plt.subplots(1, 1, figsize=(10, 10))
ax.imshow(image.permute(1, 2, 0)[:, :, band_idx])
ax.axis("off")
if show_titles:
title = f"Label: {label:.3f}"
if showing_predictions:
title += f"\nPrediction: {prediction:.3f}"
ax.set_title(title)
if suptitle is not None:
plt.suptitle(suptitle)
return fig